starwood hotel - fire and life safety standard part 1
TRANSCRIPT
HOTELS & RESORTS VVORLDVV I DE. INC.
The information contained in this document has been developed to assist you understand and implement Starwood Hotels & Resorts's requirements for fire and life safety systems and practices at your location . The Fire and Life Safety Standards contained in this document are based on existing Starwood requirements and have been revised to reflect the most up-to-date changes found in generally accepted codes and standards worldwide, such as VdS , AFNOR, LPC, NFPA, etc.
The focus of these standards is to ensure a reasonable level of safety for all building occupants, including hotel guests and staff. Starwood's philosophy is that a guest should not have to wonder as to which code or quality standard a Starwood hotel has been built. Starwood guests should be reasonably assured that, regardless of the hotel 's size, height or its location in the world, a reasonable level of fire safety, in accordance with Starwood standards, has been established.
Fire and life safety standards have been developed by many countries, states and provinces throughout the world . Many of these standards vary in content, some establishing detailed requirements, others specifying more generalized, non-specific requirements. This document has been created to provide Starwood's employees, owners, architects, engineers , etc. with a reference to consult when fire and life safety issues arise.
I am confident that you and your operations team will find this document useful and informative to you in your day-to-day operations when questions on fire and life safety arise.
If you should have any further questions about these standards, please contact the Starwood Director of Environmental Health , Fire and Life Safety, April Berkol .
1111 Westchester Avenue, White Plains, New York,10604 T (914) 640-8100
Table of Contents
.. General Introduction ........ ........ .... ........ ... ....... ....................................... ,,, .................................. . · VII
Starwood Fire and Life Safety Ph ilosophy ................... " ........................................ ... ........ ... ...... . · VII •• Fire and Life Safety Standards
Important Assumptions ....... , ..................................................................................... .. ... . · VII
......... ........... ... .................. .................. ... .... .. ........ .. ....................... .......... VIII
1 Fire Prevention ............... ....... ............ .. , ... .. .. ......... .. .. ..... ......... ....... ... ..... ..... .. .. .. . " .... .... ....... 1-1
1.1
1.2 1.2.1 1.2.2
1.3 1 .3.1 1.3.2 1.3.3 1.3.4
1.4
Introduction ........................................... .. .......................................................................
Control of Ignition · ... ........ .... .................................. ..... ...... ............................................. . External Ignition Control Internal Ignition Control
......................................................................................... ..... ... .... ..... .... .... ..... ............................................................
Initial Fire Growth · .............................. .... ........ ... ..................... .. .......... ...... ..................... . Fuel for Ignition ........................ ....... ... .............................. ........... ... .... .......... .......... . Interior Finish ••••••••• • •••••••••••••• •• •• •• •• •• •••• • • •••• •••••••••••••••••••••• •• • • ••••• •• •• ••••• ••••••• • • •• •••••••••••
Decorations • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
Special Requ irements •••• •••• •••••••••• • ••• •• ••••••••••••••••••• • ••••••• • ••••••• •••••• •••••••••••••••••••••••••••
Fire Duration • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
1.4.1 Fuel Load ......... ....................................................................................... ....... .... ... . 1.4.2 Standard Time Temperature Curve Requirements ............... ............. ..... ........... ....
Appendix 1-A - Steiner Tunnel Test ..............................................................•.. ... ......................
1-1
1-1 1-1 1-3
1-3 1-3 1-3 1-4 1-5
1-5 1-5 1-5 1-6
Appendix 1-B - Fire Tests for Flame Resistant Textiles and Films •••• ••••• •• •••••• •••••• • .................... 1-7
2 Construction ........................................................................................................ ...... ..... .... 2-1
2.1 Introduction ............ ......... ...................................................................... .. ... ......... ... .... .... 2-1
2.2 Structural Resistance to Fire ....... . . ..... ........ .. .. ........... .... .... .... .... .. .. ......... ........................ 2-1 2.2.1 Rating of Structural Elements ... .. .... .. .. .. .. ........ .... .... ....... ......................................... 2-1
23 Building Height and Area ............................ .... ................................. ..... ................. .. .. .... 2-2
2.4 2.4.1 2.4.2 2.4.3 2.4.4 2.4.5 2.4.6 2.4 .7 2.4.8 2.4.9
Fire Barriers Floors
••••• •• • • •••• ••••• •••••••• •••• ••••••••••••••••••••••• •• •• • •• •• • •• ••••• •••• ••••• • •• • • • •••••••••••••••••••••••• • •••• •
...... ..... .. ..... ............... .. .... ... ........ .. ....... ... .. ... ........ .... ....... ............................... Walls ......... .... .... .... ........................................ .... .. ....... .......... ... .............................. . . Partit ions •• • •• • ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• ••• ••• • ••••••••••••••••••••••••• ••• ••• •
Corrl·dor Walls •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • •••••••••••••••• •••• •••••••• ••• •••••
.......................................................................... ... ...... ..... ...... ......................................................................... ......................
Exit Stair Enclosures Elevator Enclosures Other Shafts · .. ....................................................................... , ...................... .... ..... . Escalators .... , ...................................................................................... .... .. .. ... ...... .. . Atria .... .. ................................................ ......................... ... ............ .... .... ................. .
2.4 .10 Separation of Use Spaces .......................................................... .... ....................... .
2-2 2-2 2-2 2-2 2-2 2-3 2-3 2-3 2-3 2-3 2-4
2.4.11 Other Areas ....... .... ........ ..... ... .. ..... ................. .. .... .......... ... ...................................... 2-4
2.5 2.5.1
.. .. ........................................................ ........................................... ..... .. Smoke Barriers Physical Barriers ................................................... , ............. ................... .... ........ ... .
2 .5.2 Smoke Management Systems ........................................................... .... ................ 2.5.3 Other Features ............................................................................. .. ........................
Appendix 2-A - Spray Nozzle Method ...................................................................................... .
••
"
2-5 2-5 2-5 2-6 2-7
3 Fire Detection and Alarm ...... .................................................. .. ...... ..... ..... ..... .... .. .......... .... 3-1
3.1 Fire Detection Principles and General Information ... .. .............. ... ....... .... .... .. ...... .... ....... 3-1 3.1 .1 General Requirements ................. ..... .......... ........................................................... 3-1 3.1.2 Human .... ................ .... ......... ... .......................................................................... ..... . 3-1 3.1.3 Heat ........................................................................................................................ 3-1 3.1.4 Smoke ....... ..... ...... ..... .......... .............................................................................. .. ... 3-1 3.1.5 Detection System Components .............................................................................. 3-2 3.1.6 Discussion/Classification of Hotel Types ................................................................ 3-8
3.2 Alarm Processing and Communication ........................................................................ 3-12 3.2.1 Fire Command Center .............................................. .. ... ......... ... ...... .. .... .... ......... .. 3-12 3.2.2 Supervisory and Trouble Signals .. ................ ....................................................... 3-12 3.2.3 Emergency Voice Alarm Communication (EVAC) Systems ........ ......................... 3-14 3.2.4 Fire Fighter's Telephone System .............. ............ .............. ......... .... ..... ............... 3-15 3.2.5 Combination Systems ................................................ .......... .. ........... .. ................. 3-16 3.2.6 System Integration .... , ............................................................... ........................... 3-18
3.3 Basic Detection and Alarm Application Concepts .................. ... ......... .. ................ .... .... 3-23 3.3.1 Fire Detection Systems ........................................................... ... ............. ... ...... .... 3-23 3.3.2 Nuisance Alarm Problem ...................................... .. ............... .............................. . 3-25 3.3.3 Control Units and Terminals ................................................................................. 3-29 3.3.4 Multiplex Systems ........ .... ......... ........................................................................... 3-30 3.3.5 Auxiliary Control Outputs ........................................................... ...................... .... . 3-31 3.3.6 Alarm and Emergency Voice Alarm Communication Systems ............................. 3-33 3.3.7 Selection Criteria for Evacuation Systems ........................................................... 3-39 3.3.8 Emergency Handling Procedures Using EVAC Systems ..................................... 3-39 3.3.9 Considerations for Alarm Organizations ... ...................................... ...... .. ........ .. .... 3-41 3.3.10 Protection of Guests with Disabilities .. .. .. ...................... ... .. ....... .. ......... .......... .. ... . 3-42
3.4 Planning for Fire Detection and Alarm Systems .......................................................... 3-44 3.4.1 Procedure for Planning a Fire Detection System ................................................. 3-44
3.5 Guidelines for Installation ............................................................................................. 3-68 3.5.1 General. ................................................................................................................ 3-68 3.5.2 Scope of Work for Supplier and Installer .............................................................. 3-68 3.5.3 Environmental Conditions ... ........ ........ .. .. ................. ... .............. .. .. ..... ... ........ ..... .. 3-69 3.5.4 Wiring Guidelines .. ........... ... ........ ......... ..................... ............... .... .. ...... ........... ..... 3-71 3.5.5 Installation and Connection of Equipment.. .... ...................... ........... .. .......... .. ....... 3-77 3.5.6 Accessibility ................ .... ........... ............... .. .. ..... ................... .. .......... ... ...... ....... .... 3-78 3.5.7 Control Equipment. ....... .... ......... .... ................ .................................. .... ,., .... .......... 3-79
3.6 Commissioning and Acceptance Test .......................................... ........ ........................ 3-79 3.6.1 Commissioning ......................................................................... .................... ........ 3-79 3.6 .2 Acceptance Tests ................................................................................................. 3-80 3.6.3 Certificate of Compliance ..... .. .. ......... .. .. .. .. .... ................................ .......... .......... ... 3-82
3.7 Operation and Maintenance ...................... , ... , ....... , .................................... , ............ , .... 3-82 3.7.1 Responsibility ...................................... , .................. , .................. ,., ..................... ,., 3-82 3.7 .2 General Tasks .................. , .............. " ................................................................... 3-82 3.7.3 System Maintenance ............................................................................................ 3-84 3.7.4 Protection of Installed System Components ....................... ..... ............................ 3-87 3.7.5 Documentation ........................................................................... ............ .............. 3-88
3.8 Summary of Technical Requirements ............................................... ........... .. .......... ... . 3-89 •••
'"
3.8.1 3.8.2 3.8.3 3.8.4 3.8.5 3.8.6 3.8.7
General .............. .......... ... ... . , ........... ....... .... ..... ... ... ............. , .... " ............................ 3-89 Smoke Detectors .......... .......... ..... ............. , .................................. ..... .... ... .... ... ..... . 3-89 Guest Rooms .................................................................................... .............. " ... 3-89 Manual Pull Stations .............. ..................... .... .... ........ ........ .............. " .................. 3-90 Wiring .............. ..................... .......... ..................................................................... . 3-90 Emergency Voice Alarm Communication (EVAC) Systems ................................. 3-90 Fire Alarm Control Panel .................................................................... ...... ... ......... 3-90
Appendix 3-A - Nuisance Alarm Problem ............................................................ .. ... .. ............. 3-92 Appendix 3-B - Electromagnetic Compatibility (EMC) ..... ..... ............................. .. .... ............... 3-96 Appendix 3-C - Additional Information on Electromagnetic Compatibility .. .......... ... .............. ... 3-98
4 Fire Suppression .......................... .. .... .... ................................ , ........ , .................................. 4-1
4.1 Introduction ... ... ....... .... .......................................... ......................................................... 4-1
4.2 Classification of Hotel Types ...... ... .. ........... .... .............................................................. . .4-1 4.2.1 General Requirements ......... .... ....... ... ......... .......................................... ........ .. .... .. .4-1
4.3 Automatic Fire Suppression ................................................ .......................................... .4-7 4.3.1 Detection Matched to Hazard ................................................. ............................... .4-7 4.3.2 Agent Matched to Hazard ................................................ ...... .. .. ............................ .4-7 4.3.3 Zoning ..... .. .. ........................................... ........................ ........................................ 4-9 4.3.4 Sprinkler Systems - General Requirements ...................... ................................... .4-9 4.3.5 Sprinkler Systems - Design Criteria .................................................................... .4-10 4.3.6 Sprinkler Systems - Components ....................................................................... .4-11
4.4 Methods of Design ............................................................................. ... .... .................. ,4-23 4.4.1 4.4.2
Hydraulic Calculations ................................................. ... .... .......... ....................... .4-23 Pipe Schedule Method ................................................................................ ........ .4-27
4.5 Sprinkler Requirements Based on Hazard .................................................................. .4-27 4.5.1 Guestrooms ...... " ................................ " ............. ,",.,., ........ ................ , .................. 4-27 4.5.2 Guestroom Corridors ........................................................................................... .4-32 4.5.3 Ceilings and Ceiling Voids ................... ... ...... ..... ..................................... ......... .... .4-34 4.5.4 Computer Rooms .... , ......... ,", .. , ...... " ... , ..... ,', .... ......... , ................... ,', .... ,', .. ... ,' "", ,4-36 4.5.5 Laundry and Garbage Chutes ..................... ................... .. .... ............................... .4-37 4,5,6 Atria , ...... ,' , ...... ,"""", .. " ...... ," " , .. , ... ," "" , .. ,' ,. ,"", ...... ,. ............. , .. , .. ,"", .. " ...... "., ... 4-39 4,5.7 Escalators" ",""', ...... " .. ,"""", .. ,""""""" "" ', .. " .. , ..................... ,", .. " .. ,' ........ " ', .. ,4-41 4,5.8 Cold Rooms ... " , .. " ... , .. ," """ "', .... ," , .. ,', ..... , ............. ,.,", .. ,"" " " """" ",.," ......... ,' .. 4-42 4.5.9 Recreation Areas (Indoor Pools, Spa Baths, etc.) .......... .... .... .... ... .. .................... .4-42 4.5.10 Special Suppression Systems ....................................... ... .. .. ... .. ... ....................... .4-42
4.6 Manual Fire Suppression ....................................................... .. ................................... .4-44 4.6.1 4.6.2
Portable Extinguishers .................................................. ....... .. .......................... .. . .4-44 Standpipe and Hose Systems ............................................................................. .4-45
4.7 Water Supplies .... ,', ...... ,', ... ". ,"" , .. ,",.,""", ..... ,', ... , ....... , .. ,""',. '. '. '. '." ' ........ " ........ ,", ... 4-50 4,7.1 General ........... , .... , .. ,",."., .. ," , ........ , .. ,", ..... , .......... ,""""""'" '."." .... ' .... , ....... , .. ,., .. 4-50 4.7.2 4.7.3 4.7.4 4.7.5
Municipal Water Supplies .... , ........................ ".,""""', ............................ ,""', .. , .. , ,4-52 Private Water Supplies ............ ,',.,', ...... ,"", .. ,"""", .. , ......................... " .. ,",." .. , .. , .4-52 Water Storage Requirements .............. .. .................................................. ............ .4-53 Pumps " ... ,""', .. , .. , ... ,., .................. ,.,', .. ,""', .... ,"""',., ........................ ,', .. ,""', ..... , .4-55
• IV
4.8 Private Service Mains ., ......... " ........... , ......................... , ................................. .... ........ . .4-60 4.8.1 4.8.2 4.8.3 4.8.4 4.8.5 4.8.6 4.8.7 4.8.8 4.8.9 4.8.10
General ...... .. ... ........................................ ............................. .. ...... .. ... .....•.. ... ..... .. . .4-60 Water Supply Requirements •• •• ••• • • ••• •• • •• •••• • •••• • • • •••••••••••••••••••••••••••••••••• • •••••••••••••••
Valves ............................................... ..... ................................................... .......... . .4-61 .4-61 4-62 Hose Houses and Equipment. ...................................... ..... .................. ... .. ... ... .. ... .
Hydrant Number and Locations ........................................................................... . Fire Department Vehicle Access .... , •••.•...•..•••••••..•...................•..•..• •••• ..................
.................................................... " ....... " .. " ........ ... .............. . Underground Piping Valve Pits ............................................................................................................
4-62 4-63 4-64 4-64
Testing ....... .. .... ........ ... ........................................... .......... ................•.... ............... . 4-65 Flushing ...................................................................................................... , ........ . 4-65
4.9 4.9.1 4.9.2 4.9.3 4.9.4 4.9.5
· ....... .. ...... .... .. .. ... ... .. .. .. .. ........... ..... .. .................................................. . Fire Department Hydrants
4-65 4-65 4-65
.4-66 4-66
· ................... ..... .......... .. .. .. ..... ....... ......................................................... . Siamese - Sprinkler and Standpipe ..................................................................... FI're Command Center ......................................................... " .. , .............. , ........ , .. . Dedicated Elevators ............................................................................................. Access .................... . ................................................... " .................... , .................. . 4-66
4.10 Commissioning and Acceptance Tests ..................................................... .................. .4-67
4.11 Operation and Maintenance ........................................................................................ .4-67 .4-67 .4-68 .4-68 .4-71
4.11 .1 Responsibility ••••••• •• •••••••• • • • •• • •••••••• •• • • •• • ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
4.11.2 General Tasks • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
4.11 .3 4.11.4
........................................................................ ................... System Maintenance Documentation • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
4.12 Summary of Technical Requirements ......... . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . .. . . . . . . . . . .. . . . . . . .. 4-71 4.12.1 Automatic Fire Suppression - Sprinkler Systems . . . . . . . . .. . . . . . . .. . . .. . . .. ....................... 4-71 4 12.2 Automatic Fire Suppression - Special Fire Suppression Systems ....................... 4-71 4.12.3 Manual Fire Suppression - Standpipe Systems ................................................... 4-71 4.12.4 4.12.5 4.12.6
Water Supplies ................................................................................................... . Fire Pumps · ........................................................................................................ . Private Fire Service Mains • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • •• • • • • • • • • • •
.4-71
.4-72
.4-72
5 Life Safety (Emergency Egress) .. ........ ... .... ........ ....... .... ................... ................................. 5-1
5.1
5.2 5.2.1 5.22 5.2.3 5.2.4
5.3 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5
5.4 5.4.1 5.4.2
Introduction ................................................................. , .................................................. 5-1
Exit Access .... ...... .. ........................................................................ .. .. ............................ . Separated Exits .................................................................... .... ............................. . Capacity · . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . , . .. . . . . . . . Travel Distance Enclosure • ••••••••••••••••••••••••••••••••••••••••••••••••••••• ••••••••••••••••••••••••••••••••••••• •• • • ••••••••••••••••
.................................................................................................................... Exit System Capacity ................................................................................................................ Means of Egress Components ....... ................... .................... ................................. Enclosure •••••••••••••••••••••••• • • •• •••••• • • •• •••••••••••••••••••• • ••••••••••••••••••••••••••••••••••••••••••••••••••••
5-1 5-1 5-2 5-3 5-3
5-4 5-4 5-7 5-8
DI'mensl'ons · ......................................................................................................... . Security ........................ ...... ........... .... ...................................................................
.. 5-9 5-10
............................................... . , ................................. ..... ...................... . Exit Discharge Capacity · ............................................................................................................. . Location ................................................................................ ............................... .
v
5-10 5-10 5-10
5.4.3 5.4.4
5.5 5.5.1 5.5.2 5.5.3
..... ........................................................................................................ Enclosure Security • •• •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
Lighting, Marking & Emergency Power ........................... .. ........ .... ....••• ....... ................. Lighting ..................................................................................................... .... Exit Signs/Marking ............................. , ....................................... ... ..... .................. . Emergency Power .................................................. ................ ... .......................... .
VI
5-10 5-11
5-11 5-11 5-11 5-12
General Introduction
Fire and life safety standards have been developed by many countries, states and provinces throughout the world. Many of these standards vary in content, some establishing detailed requirements, others specifying more generalized, non-specific requirements. Starwood has developed this website, which contains its Fire and Life Safety requirements for all Starwood properties worldwide. This website has been created to provide Starwood's employees, owners, architects, engineers, etc. with a reference to consult when fire and life safety issues arise.
The Starwood Fire and Life Safety Standards website has been developed for utilization by two different use groups - (1) the general user, which includes hotel owners, managers, employees, etc, and (2) the technical user, which includes designers, architects, engineers, etc. The general user section of the website, provides the user with a broad overview of important fire and life safety issues and definitions applicable for hotel facilities . The technical user portion of the website goes beyond the general user section, by providing detailed fire and life safety requirements important when designing a new hotel or upgrading an existing facility.
The Fire and Life Safety Standards contained on this website were based on existing Starwood requirements. These were supplemented by applicable NFPA requirements. Overall, the most restrictive requirements (including Starwood, national or local regulations) should be adopted .
Starwood Fire and Life Safety Philosophy
Starwood has developed fire and life safety requirements for all of its hotel properties. The focus of these standards is to ensure a reasonable level of safety for all building occupants, including hotel guests and staff. Starwood's philosophy is that a guest should not have to wonder as to which code or quality standard a Starwood hotel has been built. Starwood guests should be reasonably assured that, regardless of the hotel's size, height or its location in the world, a reasonable level of fire safety, in accordance with Starwood standards has been established. As a result when national or local regulations differ from those contained on the Starwood Fire and Life Safety Standards website, the most restrictive requirements should be enforced.
Fire and Life Safety Standards
The Starwood Fire and Life Safety Standards have been divided into five major components, which include the following:
• Fire Prevention - This section addresses the fire safety precautions, intended to prevent fires or keep fires from rapidly developing. Additional topics covered in this section include the control of ignition sources and limitations on interior finish materials.
• Building Construction - This section addresses the building features (i.e., compartmentation), designed to limit fire and smoke spread. The various types
•• VII
of construction and limitations on building height and area (based on occupancy) are also addressed in this section.
• Fire Detection and Alarm - This section covers the requirements for the detection systems installed to provide advanced warning of potentially hazardous conditions. Alarm system requirements designed to alert building occupants, including staff and guests, are also addressed in this section. Early detection and notification are essential as many occupants are not familiar with the layout of the hotel.
• Fire Suppression - This section addresses the design of fire protection systems provided to extinguish fires. Topics discussed in this section include automatic and manual fire suppression, and fire department access. It should be noted that all new hotels are required to be provided with automatic suppression systems installed throughout the hotel.
• Life Safety - This section discusses exit systems provided for the purpose of allowing building occupants a safe means of egress from the hotel. This section discusses such topics as exits, exit discharge, emergency lighting and power, and exit marking.
Important Assumptions
A list of critical assumptions for the protection of Starwood facilities has been developed. These assumptions are summarized below:
• All new hotels should be provided with an automatic sprinkler protection system installed throughout the hotel. This system shall be designed based on the requirements contained in the Fire Suppression Section of this website.
• The Authority Having Jurisdiction (AHJ) should be consulted throughout the design process to ensure compliance with applicable local and national codes. Careful interpretation of these standards is important and the AHJ should be contacted to ensure agreement with interpretations.
• The local fire department should be consulted throughout the design process so they are aware of the potential hazards. Careful review of the fire detection and alarm system should also be discussed with the local fire department.
• Deviation from the Starwood Fire and Life Safety Standards and local or national codes should be limited, but may be necessary and can be considered providing a full technical justification discussing the variance is presented and approved by the Starwood Director of Environmental, Health Fire and Life Safety ([email protected]). The AHJ should also be consulted whenever a variance from Starwood, local or national codes has been requested .
• A registered or licensed professional architect/engineer is primarily responsible for designing/documenting fire safety features for the Starwood property-in accordance with the Starwood Fire and Life Safety Standards.. It is also the architect/engineer's responsibility to ensure that any local regulations are also complied with.
• The property owner has the ultimate responsibility in following and enforcing all Starwood fire and life safety requirements .
• • • VIII
1 Fire Prevention
1.1 Introduction
Fire prevention begins with an understanding of:
• the types of fires that may occur in a hotel environment, • the methods to controillimit fires and fire spread both inside and outside the hotel , • the ways fire growth occurs due to the interior finish and decorative materials used in
the hotel , and • the length of the duration of the fire, which is a result of the amount of combustible
contents (e .g., furnishings, structural elements) provided within the hotel.
1.2 Control of Ignition
Control of ignition is an important aspect of fire prevention. Hazards include those located both inside and outside the facil ity. Adequate protection shall be provided for both potential hazard classifications.
1.2. 1 Extemallgnition Control
1. General Requirementsllnformation • Hazard of ignition from a fire posed by conditions outside the hotel, such as
fires in adjacent structures or surrounding buildings.
2. Technical Requirements/Information (a) A hotel can be threatened by a fire that starts at an adjacent property. (b) Exposure protection is required to prevent ignition from an adjacent
building. May be accomplished by: • Physical separation between buildings • Increasing exposed building 's fire resistance.
(c) Where Required: • Exposure protection is required where the nearest building is within 30 It
(9.1 m) of the facility. • Figure 1-1 details where exposure protection is required .
(d) Degree of Protection • Non-bearing exterior walls with 1 hour fire resistance rating : 1-hour fire
protection rating where used for vertical openings or exit enclosures, or Y. hour fire protection rating where used elsewhere.
• Non-bearing exterior walls with 1 hour fire resistance rat ing: Y. hour opening protectives required .
I - I •
EXPOSING BUll..DVIIG SAME HEIGHT OR HIGHER
I kAUI CIt 1m
I .'Ial CIt 1m
+--< 3J (!On)
EXPOSING BUllOING LOWER
T •
fl (15m) .1. __
4-- < 3J ft. -~-j, (!On)
- -- -
<-- <3Jft. - -IO (!On)
wcporl-g building
-.,- ' IQ r=.+",'U
Fran &;-,6+ III
"'" tnt ms' WW'ICO < 1,5 1'1' .
"'" h PSIJ'anca rating :t 1,5 1'1'
Figure 1-1 - Conditions for Exposure Protection
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1.2.2 Internal Ignition Control
1. General Requirementsllnformation • Hazard of ignition from a fire posed by condit ions inside the building, such
as human acts (smoking, arson) and malfunction of electrical/mechanical equipment.
2. Technical Requirements/Information (a) Sources of internal ignition in a hotel may include:
• Electrical and Mechanical systems • Human acts - smoking, arson, etc.
(b) To prevent ignition, electrical systems shall be designed to accommodate the maximum anticipated power loadings without causing electrical faults or short circuits .
(c) Special use areas (kitchens, woodworking faci lities, etc.) shall have electrical/mechanical systems designed for the specific use.
(d) Design/installation of electrical systems shall meet NFPA 70, National Electric Code.
1.3 Initial Fire Growth
1.3.1 Fuel for Ignition
1. General Requirements/Information • Combustible materials including interior finish materials and furnishings .
2. Technical Requ irements/Information (a) Studies have shown that fires orig inate in storage areas, primarylauxiliary
function rooms, and special use areas (kitchens, laundry areas, etc.). (b) Storage of combustible materials shall not be permitted to accumulate in
corridors, etc. Such materials shall be kept in designated storage rooms. (c) Use of highly flammable materials (polyurethane foam, foamed plastics ,
etc.) for interior finish or furnishings is discouraged. (d) The design of such spaces shall anticipate the changing needs of the
facility and shall also consider the large amounts of combustible materials that can accumulate.
(e) These spaces shall be separated from other parts of the build ing by fire resistive barriers.
(f) Where these materials are used, they shall be enclosed in fire resistant barrier materials or shall be listed for use without a barrier material.
1.3.2 Interior Finish
1. General Requirements/Information • Includes exposed materials applied to the surface of walls , floors , ceilings
and other structural members. These materials are tested and rated in accordance with industry standards.
2. Technical Requ irements/Information (a) Includes exposed surfaces of construction systems including:
• Fixed/movable walls • Floors, ce ilings • Columns, beams
(b) Materials used on these surfaces include:
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• Paneling • Carpeting • Ceiling tiles
(c) Materials are tested in accordance with ASTM E-84, NFPA 255 - Standard Method of Test of Surface Burning Characteristics of Building Materials or UL 273, also known as the "Steiner Tunnel Test" (see Appendix 1-A).
(d) Flame spread ratings shall not exceed 25 in exit stai rs, 75 in lobbies and exit corridors, and 200 in all other spaces.
(e) Smoke development ratings sha ll not exceed 450. (I) For addi tional information on required fire tests of finishes and furnishings,
contact the Director EHF & LS. (g) Table 1-1 details the maximum ratings permitted for interior finish materials.
Table 1-1 - Maximum Ratings for Interior Finish Maximum Flame Spread Ratings (Source - NFPA 101, 2000 edition)
Maximum Rating
Occupancy Exit Access to Exits Other Spaces
ASSEMBLY
• 300 occupants or less 75 75 200
• Greater than 300 occupants 75 200 200
HOTEL
• New 75 200 200
• Existing 200 200 200
MERCANTILE
• New 200 200 200
• Existing, Class A1 or B2 200 200 Ceilings - 200 Walls - 200
• Existing Class C3 200 200 200
BUSINESS 200 200 200
STORAGE 200 200 200
Notes: 1. Class A - Mercanti le occupancies with total gross area greater than 30,000 ttl (2787.1 m2
), or with more than 3 levels (excluding mezzanines).
2. Class B - Mercantile occupancies with more than 3000 tr (278.7 m2), but less than 30,000 ff
(2787.1 m2) or using floors above or below the street level floor.
3. Class C - Mercantile occupancies with not more than 3000 ttl (278.7 m2) .
4. Assumes complete sprinkler protection throughout facility.
1.3.3 Decorations
1. Genera l Requirementsilnformation • Include curtains, fabrics and other materials used for decorative purposes
in hotels. These materials are tested and rated in accordance with industry standards.
2. Technical Requirements/Information (a) Items such as curtains, fabrics and films must pass an approved test for
flame resistance (i.e ., NFPA 701 - Standard Methods of Fire Tests for F/ame Propagation of Textiles and Films, UL 2 14 - Fire Tests for Flame Resistant Textiles and Films - see Appendix 1-8).
(b) For additional information on required fire tests of finishes and furnishings , contact the Director EHF & LS.
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1.3.4 Special Requirements
1. Carpeting shall not be used on ceilings or walls. 2. Rubberized hair and felt padding shall be used for ca rpet padding. Use of
synthetic padding is discouraged. Foam padding is prohibited.
1.4 Fire Duration
1.4.1 Fuel Load
1. Technical Requirementsllnformation • Fire Load is the maximum amount of combustible materials expected in a
given area. Combustible materials include structural elements (walls, ceilings, floors) and contents, furnishings found in the building. Measured in Ibs/ft'.
1.4.2 Standard Time Temperature Curve Requirements
• u.
'" ~ :J -'" ~ '" Cl. E '" f-
(a) ASTM E-119, UL 263 and NFPA 251, Standard Test Method for Fire Tests of Building Construction and Materials - Test method, which uses the Standard Time-Temperature Curve to evaluate fire resistance of structural elements, such as walls, floors, doors, etc."
(b) Figure 1-2 displays the Standard TimelTemperature Curve.
2400
2000
1600
1200
BOO
400
a 0
-+-+-+-+- -f- -
-t-
1
-+--+- -+-f- -t- -
++--l- -++- -++-+--+-
--
+ - -
2 3 4 5 6 7 8
Time in Hours
1315
1095
B70
650
425
205
Figure 1-2 - Standard Time Temperature Curve
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U Q) ~
:J -'" ~ Q) Cl. E Q) f-
Appendix 1-A - Steiner Tunnel Test
• ASTM E84, NFPA 255, and UL 273 also known as the Steiner Tunnel Test was developed by A. J. Steiner at the end of World War I. These standards should be consulted for more detailed information.
• Sample - This test uses a 20 in. (50.8 cm) by 25 ft. (7.6 m) specimen, placed on a ledge in the top of the furnace in a face down position. The removable lid is set in place and sealed, exposing a 17 in (43.2 cm) by 25 ft (7.6 m) area .
• Exposing Elements - A double jet gas burner, located 1 ft (0.3 m) from the air intake end of the tunnel, provides approximately 5000 Btu/min during the 10 minute test period. An induced air now of 240 ftlmin (73.2 m/min) is drawn through a 3 in (7 .6 cm) by 17Y> in. (44 .5 cm) intake opening. This draws the gas name approximately 4Y> ft (1.4 m) down the tunnel, leaving 19Y> ft (5.9 m) for the name to propagate.
• The rating is determined by the distance the name advances down the material, and the time combustion continues to take place.
• Flame spread ratings and smoke development ratings are developed based on cementasbestos board (arbitrarily assigned a rating of 0), and red oak nooring (arbitrarily assigned a rating of 100).
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Appendix 1-B - Fire Tests for Flame Resistant Textiles and Films
• Fire tests for flame res istant textiles and films are based on NFPA 701 and UL 214. These standards should be consulted for more detailed information .
• These tests are not applicable for materials used for clothing or applied to the surfaces of building/backing materials as interior finish .
• Large scale and small scale tests are performed. • Large Scale Test Specimens - Uses ten specimens measuring 7 in (17.8 cm) wide by 7
ft (2.1 m) long and four specimens measuring 25 in (63.5 cm) wide by 7 ft (2.1 m) long. • Small Scale Test Specimens - Uses ten specimens measuring 3)1, in. (8.9 cm) by 10 in.
(25.4 cm) - five in the direction of the warp and fire in the direction of the fill. • In both tests, the material is exposed to an open flame , with the material in the vertical
position. For the small scale tests , the flame is removed after 12 seconds, while the flame is removed after 2 minutes for the large scale tests.
• The material continues to burn and the test continues, until flaming and afterglow stop. • Conditions for acceptance of the material are as fol lows:
(a) Both tests - Flaming stops with in 2 seconds of removal of ignition source. (b) Both tests - Material which breaks/drops from the specimen does not continue to
flame after falling. (c) Small scale test - Length of charring does not exceed values specified in the test. (d) Large scale test - Length of charring does not exceed 10 in. (25.4 cm). (e) Large scale test - Surface spread of flame in a folded specimen does not exceed 35
in. (88.9 cm), (afterglow may spread in the folds).
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2 Construction
2.1 Introduction
In the event a fire occurs, it is important to limit fire and smoke spread throughout the hotel. One way this can be accomplished is by dividing the hotel into fire resistive compartments using fire rated barriers such as walls, floors , ceilings, etc. New hotel facilities are required to be designed to prevent the disbursement of fire and smoke throughout the building.
The type of construction for a building is determined based on the types of occupancies in the building. Based on the specific occupancy, the building height and area can be determined. The building height and area will impact the means of egress out of the building and the ease of fire fighting operations.
2.2 Structural Resistance to Fire
2.2.1 Rating of Structural Elements
(a) The construction type shall be based on the requirements of NFPA 101, the model building code in effect for the site, or other applicable locallnational regulations.
(b) The integrity of columns, beams and bearing elements is essential if the building is to withstand fire.
(c) As buildings increase in size, the ability of the structural frame to perform when exposed to fire becomes more critical.
(d) The ability of the structural frame to withstand fire is measured using ASTM E-119, UL 263, and NFPA 251, Standard Test Methods for Fire Tests of Building Construction and Materials.
(e) ASTM E-119 - This test method evaluates the ability of the structural element to withstand the standard fire. Results of this test are expressed as fire resistance ratings.
(f) Fire resistance rating of the structural elements is related to the type of construction used.
(g) Types of Construction • Type 1: Fire Resistive Construction - Buildings constructed of non
combustible materials (i.e., steel, concrete). Have a high level of fire endurance.
• Type 2: Non-Combustible Construction - Similar to Type 1, buildings do not have as high a level of fire endurance as Type 1.
• Type 3: Exterior Masonry Wall Construction - Exterior walls constructed entirely of non-combustible materials such as brick or concrete block. Interior structural members are constructed of wood or metal.
• Type 4: Heavy Timber Construction - Fire resistance rating is achieved by: o Specifying minimum sizes of wood structural members and minimum
thickness and composition of wood floors and roofs. o Proper protection of concealed spaces under floors and roofs, o Use of approved fastenings, construction details and adhesives for
structural members, and o Providing the proper degree of fire resistance rating in exterior and
interior walls. • Type 5: Wood Frame Construction - Buildings with exterior and interior walls,
and interior fram ingldecking constructed of wood. • Types 3B and 5B Construction are not permitted.
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(h) The minimum fire resistance rating of structural elements shall , at a min imum, meet the requirements of NFPA 101 , Life Safety Code. If building code requirements or other codes are more restrictive, then these requirements shall be enforced.
2.3 Building Height and Area
The maximum building height and area allowed shall be based on the requirements of NFPA 101 , Life Safety Code which references NFPA 220, Standard on Types of Building Construction .
2.4 Fire Barriers
Fire barriers are an important method to limit fire and smoke spread within a building. The following sections summarize the types of fire barriers and associated requirements :
2.4.1 Floors
Typically first major barrier to be exposed to fire. The longer this system withstands the fire, the longer people have to evacuate the building.
2.4.2 Walls
(a) Highly reliable barrier installed to limit fire spread. Commonly used to separate different occupancies, to subd ivide floors of excessive area and as horizontal exit barriers. Shall have sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall.
(b) Must be constructed of non-combustible materials. (c) All penetrations in fire rated walls must be properly protected. (d) 3 hr or 4 hr walls : 3 hr rated doors andlor dampers (e) 2 hr walls : 1 Y, hr rated doors andlor dampers (f) Doors, dampers and fire stopping materials must be listed by UL or other
nationally recognized testing laboratory.
2.4.3 Partitions
(a) Any wall with a fire rating of 2 hours or less, that is not a "fire wall ". Used to separate different use spaces within the same occupancy.
(b) Shall be continuous from top of floor surface below to the underside of the floor/roof slab or deck above.
(c) Any penetrations must be sealed with non-combustible material for full thickness and equal to the fire resistance rating of the barrier.
(d) Duct openings: Must be provided with fire dampers, if the wall being penetrated has a fire resistance rating of 2 hours or more.
(e) 2 hour partition : 1 Y, hour rated doors (f) 1 hour partition: Y, or Y. hour rated doors
2.4.4 Corridor Walls
(a) Used to separate use spaces from path of travel to the use spaces. (b) Guestroom Corridors - 1 hr fire resistance rating, with self-closing 20 minute
fire rated door assembl ies. All guestroom doors shall have automatic closers and shall be positively latching. Exception: NFPA 101, Life Safety Code, allows y. hour fire rated corridor walls, where automatic sprinkler protection is installed
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throughout the hotel. This exception can be applied if other codes do not require more restrictive ratings
(c) Fire doors that are frequently held open, shall be provided with electromagnetic hold open devices, that will release when activated (i .e., smoke detector, water flow device).
2.4.5 Exit Stair Enclosures
(a) Not permitted to be used for the storage of any materials. In addition, the construction of storage rooms in stairwells is not permitted.
(b) Serving more than 4 stories: 2 hour fire-rated enclosure required , with 1 Y, hr rated door assemblies.
(c) Serving 4 stories or less: 1 hour fire-rated enclosure required, with 1 hour rated door assemblies.
(d) Penetrations in stairwells are only permitted for exit doorways, piping for fire suppression, conduit for electrical equipment, ductwork for ventilation, and openings for stairwell pressurization .
2.4.6 Elevator Enclosures
(a) Shall be of 2 hour fire resistive construction . (b) Maximum of four elevators permitted per shaft. (c) All penetrations in the enclosure must be grouted or sealed to the full thickness
of the wall and dampered.
2.4.7 Other Shafts
(a) Used for ventilation equipment, electrical wiring , trash chutes, linen chutes, dumbwaiters, etc.
(b) Shall be protected by enclosures with fire resistance rating of 2 hours, with all penetrating openings protected.
2.4.8 Escalators
(a) Must be enclosed with barriers if part of the exit system. (b) If not enclosed as required for exit stairwells, the floor opening must be
protected to limit the possible spread of fire vertically. (c) For additional information on ways to enclose escalators refer to Appendix 2-A,
Spray Nozzle Method.
2.4.9 Atria
(a) Large vertical opening that spans two or more floors. (b) Must have a minimum horizontal dimension of 20 ft (6.1 m) and a min imum
area of 1000 ft2 (92.9 m2). (c) Floor openings that do not meet the dimensional requirements for atria shall be
limited to a total of three stories and shall be protected by the Spray Nozzle Method, refer to Append ix 2-A.
(d) Atria are permitted in hotels provided the following requirements are met: • Type 1 A, 1 B or 2A are the only types of construction in which atria are
permitted. • The amount of combustible furnishings and decorations contained within
the atrium shall be limited . • Smoke detectors are required to be installed on the underside of the floor
protruding into the atrium, at the atrium roof, and adjacent to each return air intake from the atrium.
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• Separation - The atrium must be separated from adjacent spaces with 1 hour fire rated walls and automatic/self-closing opening protectives. Exception: A glass wall with closely spaced sprinklers may be used in lieu of tire barriers, provided the sprinklers are spaced no more than 6 ft (1.8 m) apart and are within 1 ft (0.3 m) of the glass wall. The glass shall be wired, laminated or tempered glass in a steel frame held in place by the gasket system, which permits the glass framing system to deflect without loading the glass before the sprinklers operate.
• Smoke Exhaust Systems o Atria with volumes less than 600,000 ft3 (17,003 m3) shall be provided
with a smoke exhaust system at the ceiling capable of exhausting 40,000 CFM (1,134 m3/min) or six air changes per hour, whichever is greater. For volumes greater than 600,000 ft3 (17 ,003 m3), the system shall be capable of exhausting four air changes per hour.
o Gravity supply inlets shall be provided at the lowest level of the atrium and shall be sized for 50% of the exhaust for atria 55 ft (16 .8 m) or less in height. Atria greater than 55 ft (16.8 m) in height shall have supply air mechanically introduced near the bottom of the atrium and directed upward toward the top of the atrium at a rate equal to 50% of the exhaust.
o An acceptable alternative to the smoke exhaust system requirements detailed above can be found in NFPA 92B, Guide for Smoke Management Systems in Malls, Atria, and Large Areas.
o The atrium smoke exhaust system shall be activated by the sprinkler system, atrium smoke detectors, andlor manual controls provided for use by the fire department.
• Up to three levels of the hotel may be open to the atrium, provided this space is included in the total volume used for smoke management systems.
• Exits must be separately enclosed from the atrium. • Existing atriums shall be reviewed by a fire protection engineer to
determine what systems need to be added or upgraded.
2.4.10 Separation of Use Spaces
(a) Major building use categories shall be separated from each other. (b) Separation requirements shall be based on local building codes or other
standard enforced by local AHJ . (c) When two occupancies w ith different fire resistance ratings are to be
separated, the higher fire resistance rating for the barrier shall be used .
2.4.11 Other Areas
(a) Based on the potential hazard of some spaces, fire resistance rated barriers are required between different spaces.
(b) At a minimum, the following areas shall be provided with fire res istant rated floors and walls as described below:
• 1-HOUR o Kitchens o Computer Rooms
• 2-HOUR o Boiler Rooms o Transformer Rooms o Switchgear and Emergency Switchgear Rooms
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o Laundry Rooms o Combustible or Flammable Liquid Storage/Use Rooms o Carpenter Shops o Furniture Refinish ing Rooms o Dry Cleaning Rooms o Projection Booths o Fire Pump Room o Transformer Switch Room o Generator Room o Combined Computer/PBXlPABX Room
• For new construction and where practical in existing facilities, the following shall be constructed as wholly separate spaces: o Fire Pump Room o Electrical Switchgear Room o Emergency Generator Room o Emergency Switchgear Room o Emergency Power Transfer Switch Room
2.5 Smoke Barriers
There are many ways to restrict the movement of smoke, including physical barriers and smoke management systems.
2.5.1 Physical Barriers
(a) During a fire, the atmosphere in the room is mixture of smoke, fire gases and hot air. As the fire grows, the pressure and temperature of the air increase. This increase in pressure is great enough to force smoke and fire through any openings in the room.
(b) Doors are important barriers to help prevent the spread of smoke. Doors opening into any portion of the exit system shall be provided with self-closing or automatic closing devices and positive latching hardware. This equipment is not required on doors leading to rooms with low amounts of combustibles, such as restrooms.
(c) Spaces around penetrations, such as pipes, conduits, or ducts, should be sealed with a non-combustible material.
2.5.2 Smoke Management Systems
(a) Smoke management systems are not required by Starwood. (b) Barriers, such as walls and doors, will influence the spread of smoke in a
building. The presence of automatic fire suppression systems will also minimize the amount of smoke generated.
(c) An engineered smoke control system uses building HVAC fans to help maintain tenable conditions in the means of egress during evacuation and to limit the spread of smoke throughout the building .
(d) The objective of smoke management system is to provide a relative negative pressure in the fire zone. This can be accomplished by stopping both the supply fan serving the zone containing the fire and the exhaust fan(s) serving all other areas of the building, and by starting the exhaust fan in the fire zone and the supply fan(s) in all other areas.
(e) In order for the fire department to have a clear understanding of which areas are affected by the supply and exhaust fans, a graphic display of the hotel
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showing the areas serviced by each fan shall be mounted near the manual controls.
(f) For detailed requirements for smoke management systems refer to NFPA 92A, Recommended Practice for Smoke Control Systems.
2.5.3 Other Features
Stairwell pressurization is not required by Starwood; however, many jurisdictions require these systems if the building is classified as a high-rise.
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Appendix 2-A - Spray Nozzle Method
• Closely spaced sprinklers (creating a water curtain) are recommended for the protection of large floor openings, such as those created by escalators or atria.
• Sprinklers shall be spaced no more than 6 ft (1.8 m) apart and 6-12 in. (15.2-30.5 cm) from the opening. Cross baffles shall be installed for sprinklers spaced closer than 6 ft apart.
• Sprinklers shall be hydraulically designed to discharge 3 gpm per lineal foot (38 Umin per lineal meter), with no sprinklers discharging less than 15 gpm (58.6 Umin).
• The number of sprinklers calculated shall be the number in length, corresponding to the length parallel to the branch lines in the design area.
• The demand of the system shall be added to the demand of the hydraulically calculated system for the area of operation.
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3 Fire Detection and Alarm
3.1 Fire Detection Principles and General Information
3.1.1 General Requirements
(a) Fires may be detected by automatic devices (smoke detectors, heat detectors, activation of sprinkler system) or by human senses.
(b) Installation of fire alarm/detection systems shall be supervised by qualified/experienced personnel.
3.1 .2 Human
(a) If a fire is detected by a person, information regarding the fire should be transmitted as quickly as possible .
(b) Means to activate/send alarms include manual alarm stations. (c) Manual alarm stations shall be located near exits, assembly areas
(restaurants, dining rooms, etc.) and at the hotel desk or other continuously supervised locations.
(d) The travel distance to a manual alarm station shall not exceed 150 ft . (46 m).
(e) Manual alarm devices shall be connected to the bui lding alarm system. (f) Activation of the device shall be received at the Fire Command Center
and the local fire department. (g) For areas where nu isance alarm problems are anticipated, a double
action alarm station (requires two actions to be performed in sequence in order to activate an alarm) may be used.
3.1.3 Heat
(a) The automatic sprinkler system serves as the automatic heat detection system. Sprinkler systems are heat activated and are requ ired to be installed in all Starwood hotels.
(b) Generally sprinklers are required throughout the building, however there are a few locations where sprinklers may be omitted, such as transformer rooms, elevator machine rooms, etc. In these areas combination heat/smoke detectors are required .
3.1.4 Smoke
(a) Smoke detectors are required in all areas of the building . (b) Type of smoke detector shall be selected based on the specific
application . (c) Where nuisance alarm problems are anticipated, nuisance alarm
reduction methods can be applied. Appendix 3-A contains add itional information on nuisance alarm reduct ion methods.
(d) Interconnected smoke detectors shall be installed in every guestroom, for new construction and major renovat ions. These detectors shall sound a local alarm in the room and shall be annunciated at the Fire Command Center. In addition, the detectors shall be fully supervised , such that a trouble ind ication is activated if the detector is removed or not reporting .
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(e) Single station smoke detectors, receiving primary power from nonswitchable bu ilding AC circuit may remain in use in existing hotels.
(f) If the guestroom/suite contains more than one bedroom, a detector shall be installed in the access to each sleeping area.
(g) In rooms designed for accessibility for the hearing impaired, the smoke detectors shall be equipped with a visua l strobe light.
3.1.5 Detection System Components
A fire detection system typically found in hotels may consist of the following components:
(a) Automatic fire detection devices • General
o Initiating devices include automatic fire detection devices , sprinkler waterfiow detectors, and manually activated fire alarm stations.
o Evaluate the environment for smoke, flames, radiation or heat. o Devices within a distinctive geographical area are connected
together to form an annunciation zone. o Upon detection of an alarm cond ition, a signal is transmitted to
the control unit which provides operating power to the detectors. The entire zone wiring and all detectors are supervised by the control unit.
o Devices shall be protected against mechanical damage. Mechanical guards shall be listed for such use.
• Spot Type Smoke Detectors - Are able to detect fire in early stages, before flames occur. Smoke detectors shall be marked with the nominal production sensitivity (percent per foot obscuration). Types of smoke detectors include: o Ionization-type Smoke Detectors respond to visible and
invisible products of combustion . These detectors are widely used, however there are minor restrictions with regard to the environmental conditions of the area they monitor (high air velocity, humidity, etc.) Figure 3-1 shows typica l ionization type smoke detectors.
•
Figure 3-1 - Typical Ionization Smoke Detectors
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o Optical Smoke Detectors respond to visible products of combustion , especially light-reflecting smoke. Suitable for the protection of general areas in hotels and for electrical installations. Figure 3-2 shows typical optical smoke detectors.
Figure 3-2 - Typical Optical Smoke Detectors
o Smoke Detectors for Air Duct Monitoring consist of a smoke chamber, which is connected to the air duct by means of an air bypass syslem. Figure 3-3 shows a typical air duct monitoring unit.
Figure 3-3 - Typical Air Duct Monitoring Unit
• Linear Beam-Type Smoke Detectors o Most common linear beam type smoke detectors operate on
theory of obscuration. o Use an invisible light beam, when the beam becomes
obscured by smoke (at a pre-determined level), an alarm is generated.
o Suitable for the protection of large spaces - ballrooms, corridors, atriums, etc.
o A typical linear beam-type smoke detector set is shown in Figure 3-4.
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Figure 3-4 - Typical Linear Beam Type Smoke Detector Set
• Incipient Type Fire Detection Systems o Operate on one of two basic methods - light scattering or
cloud chamber detection. o Utilize a network of sampl ing tubes located with in a protected
area. o If smoke particles exist in the air sample, they are detected by
one of the methods described above. o Respond faster than standard spot-type detectors. o Suitable for clean environments and areas where detection is
required at the earliest possible stage. Also suitable for large spaces which are inaccessible to spot-type detectors such as atriums and large ballrooms subject to multiple configurations.
• Spot-Type Heat Detectors - Suitable for environments where rapid fire development is expected and where smoke detectors can 't be used because of environmenta l cond itions and where sprinklers can't be installed due to water sensitivity of equipment. Heat detectors shall be marked with color coding per the requirements of NFPA 72.
Types of Heat Detectors include: o Rate of Rise Heat Detectors - can detect rapid temperature
changes, typically associated with open flames fires . Typically used in dirty or greasy environments, such as kitchens, mechanical workshops, elevator machine rooms, etc.
o Fixed Temperature Heat Detectors - go into alarm when preset temperature is exceeded. Should be used when rate of rise type detectors are not suitable - above cooking stoves and deep fryers .
o Dual Element Heat Detectors - combine the features of rate of rise and fixed temperature heat detectors. Suitable for extremely dirty/dusty environments such as underground garages with insufficient ventilation, tunnels, etc.
o Line-type Heat Detectors - typically consist of two actuators encased in heat sensitive material. When the critical temperature is reached , the insulation material melts, contact
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is made between the two conductors and an alarm is initiated. All line-type detectors respond to heat applied which does not have to be the result of an open flame.
o Rate Compensated Heat Detector - responds when the temperature of air reaches a pre-determined level, independent of the rate of temperature rise . Typically not used in hotels.
o A combination rate-of-rise/fixed temperature heat detector is shown in Figure 3-5.
o Heat detectors are not required in most areas of fully sprinklered buildings.
Figure 3-5 - Combination Rate-of-Rise/ Fixed Temperature Heat Detector
• Flame Detectors - Respond to the effects of open flames . o Actually respond to the optical radiation effect of flames , such
as color (wavelength) and flickering . o Typically used in high, wide, open spaces such as terraces ,
patios, etc., where smoke/heat wil l not accumulate to make the other types of detectors respond.
o Typically not used in hotels. o A typical flame detector is shown in Figure 3-6.
Figure 3-6 - Typical Flame Type Detector
(b) Manual Alarm Stations • Allow manual activation of fire detection system. • Should be located near exits, at the entrance to stairwells, in high
risk areas, etc.
3-5
o Should be mounted so they are highly visible, yet accessible to persons with disabilities.
o Should be on separate annunciation zones from automatic detection devices.
o The location and spacing of these devices shall meet the requirements of NFPA 72.
o Examples of types of manual alarm stations are shown in Figure 3-7.
Figure 3-7 - Examples of Manual Alarm Stations
(c) Sprinkler System Water Flow Monitoring o The activation a sprinkler can be monitored by flow or pressure
switches installed on the sprinkler system. o Initiation of the alarm signal shall occur within 90 seconds of water
flow at the alarm initiating device. o Water flow and pressure switches can be installed at the main
supply and on various branch lines of the system. This will help determine the location of the fire .
o Other conditions such as water tank level, electrical pump readiness, etc. may be monitored by the fire alarm system. Any abnormal conditions would result in a trouble or supervisory condition .
o All sprinkler systems are required to be monitored by the fire alarm system .
o All control valves shou ld be supervised to ensure the system is available when needed.
3-6
(d) Optional Monitoring Devices • In general, devices not related to fires should not initiate an alarm,
but should indicate trouble or supervisory condition. • It may be advisable to monitor devices related to the building's life
safety equipment, such as standpipes/hose systems, water supplies, valves, etc.
• Hose Reel Monitoring - Useful where unwarranted removal of fire hoses may occur. Monitoring points could include a switch which signals opening of a hose cabinet or removal of hose, and a flow switch which indicates that water is being discharged.
• Manual Fire Extinguisher Monitoring - Removal of fire extinguisher can be signaled, indicating use or theft.
(e) Fire Alarm Control Panel (FACP) Unit • Information center of the fire alarm system. • Evaluates incoming signals from detection devices, manual alarm
stations, etc. • Initiates alarms and fire control measures (door closure , fan
control) • Must be equipped with backup power supply. • May be combined with operator's terminal to form operational
center of the fire alarm system. • In larger installations, several control units may report to a single
operator's terminal. • Main functions of the FACP include:
1. Electronic monitoring of all connected activation devices (detectors, manual alarm stations, water flow/tamper switches, etc.)
2. Provision of electrical supply to the detectors 3. Control of operator's terminal, local or remote 4. Activation of internal alarms 5. Automatic alarm transmission to the fire brigade 6. Activation of control outputs
• The control unit consists of an enclosure with printed circuit boards, uninterruptible power supply, and wiring terminals for input/output connections.
• The operator's terminal consists of the operation and indication panel, which allows full operation of the system in all situations.
• Typical control units are subdivided into the following sections: 1. Annunciation Section - provides alarm, trouble and active
lights per zone and displays the overall conditions of the system.
2. Operation/Control Section - consists of a set of push buttons and switches which allow alarm/trouble acknowledgement, zone and system reset. Other commands may be given to the control unit depending on the complexity of the installation .
3-7
3.1 .6 Discussion/Classification of Hotel Types
(a) Type A - Roadside Hotels/Motels
II II
Figure 3-8 - Roadside HotelslMotel
• Single or double-story buildings, usually spread out over a large area.
• Escape routes are usually simple and fire fighter access is normally uncomplicated .
• Buildings are usually of very light construction and do not provide much resistance to fire . Due to the light construction, the possibility of spreading fire quickly is high .
3-8
(b) Type B - Regional Hotels
Figure 3-9 - Regional Hotel
o 'Low-rise' bu ildings, typically five floors or less. o Easily accessible via the parking lots surrounding the building. o Escape routes are slightly more complex than for Type A bu ildings,
since guestrooms may on ly be accessible via a main lobby arrangement.
o May have central AC systems and air handling units, which would increase the potential for smoke distribution .
o The fire detection system should control the air condition ing system via its output controls .
o As a general guideline, the exhaust fans should be running and the supply fans should be stopped for zones in alarm. This creates an underpressure in the area of smoke and an overpressure in smokefree areas.
o Escape routes such as stairwells are usually switched to 100% fresh air supply and kept pressurized as long as the emergency situation exists .
3-9
(e) Type C - Metropolitan Hotels
Figure 3-10 - Metropolitan Hotel
• Typically consist of a single building block, with more than six stories.
• Fire fighter access is far more difficult than Type A and B buildings. • Escape routes may be complex and include separate, distributed
exit stairwells leading directly to the outside. • Typically, access to guestrooms is through a central lobby,
surrounded by elevators. • Smoke control systems should be considered due to the AC and air
handling systems installed in Type C buildings. • The Fire Command Center should preferably contain a control panel
from which the fire chief can override any automatic controls.
3-10
(d) Type 0 - High-Rise Hotel Buildings
Figure 3-11 - High Rise Hotel
• Buildings have a large number of stories and rooms. • Escape routes are extremely important. Elevators shall not be used
in case of fire, therefore emergency stairwells are the only means of evacuating the building in a conventional manner.
• High degree of fire resistance for construction and early fire suppression by mandatory sprinkler systems provide the occupants a long period of time in which to vacate the building.
• Smoke is one of the greatest hazards in high-rise hotels. Early smoke detection by sensitive and reliable detectors is extremely important.
• The potential for panic should be recognized for high-rise hotels and shou ld be compensated for by the following measures: 1. Make guests feel familiar with the premises (permanently
displayed safety and emergency instructions in room). 2. Clearly mark all escape routes 3. Initially, alert only endangered areas
3-11
4. Give clear directions to escaping persons via live voice communication .
• Elevators for use by fire-fighters shall be automatically recalled to designated floor.
• The status of all elevators shall be provided on an elevator status panel located in the Fire Command Center.
• A display panel for the HVAC systems should also be provided in the Fire Command Center.
• The fire officer in charge should remain in the Fire Command Center during an emergency. This person can inform and direct escaping persons and communicate with the fire fighters via the emergency telephone system.
• The emergency telephone system is an important means of communication in high-rise hotels. This system is required for Starwood high-rise hotels.
3.2 Alarm Processing and Communication
3.2.1 Fire Command Center
1. General Requirementsilnformation After the fire has been detected, the alarm signal is sent to the hotel's Fire Command Center. At this point, the signal is analyzed and the appropriate actions are determined .
2. Technical Requirements/Information (a) Shall be located in a portion of the facility near the main entrance.
This should be coordinated with local AHJs. (b) The command center is the base of fire department operations, and
is used to house the communication and fire system control panels. (c) Information displayed at the Fire Command Center shall also be
displayed at satellite panels located in the telephone operators' area, near the front desk and in the facility engineering offices of a large complex.
3.2.2 Supervisory and Troub/e Signals
(a) Personnel monitoring the hotel's Fire Command Center must be able to differentiate between a fire alarm signal, a trouble signal (result of system/device failure) and a supervisory signal (initiated by a piece of supervised equipment).
(b) The Fire Command Center shall be designed for the strict needs of the operator. Specifications shall require • Permanently mounted clear operating instructions and labeling, • Understandable hotel nomenclature, and • Clear zone layouts
(c) Fire alarm systems will be divided into zones. The size of the zone is dependent on the size of the facil ity and the individual use spaces.
(d) Zoning shall be by bu ilding, floor and device type, with no zone exceeding 20,000 ft' (1 ,858.1 m' ).
(e) Table 3-1 summarizes the actions to be taken when signals are received at the Fire Command Center.
3-12
_____ =,-'TT'a:.=b.:,:le::...3-1 -~pical Action on Alarm Matrix ACTION CI G sa a Ii TAKEN .f s ~ ~ ~ ~ § -§ ~ ~
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INlTlAnNG DEVICES
s"' ..... ;v;,~ .. (Push
Sprin~r Wale, Flow
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FA Pump Running
~ ~ • ~ Poit'er
~ ~.~aI Conlt"'!.., Fite~Ctr
I-.~ ..
~_or
I •
.i Eu i Cl tri o~ e (I)>. 2jiC:
w ~i <~ ~~ 18 ~ ~~ ~~
-• • • • • • • • • • • • • • • • • • • • • • • • • •
•
+
• + •
• • •
3-13
• • • •
• • •
• • • • •
• •
3.2.3 Emergency Voice Alarm Communication (EVAC) Systems
(a) Every Starwood property shall be provided with a complete detection and emergency voice alarm communication system.
(b) Shall consist of an aud io control panel and speaker circuits located throughout the building .
(c) From the Fire Command Center, the speakers can be fed from a variety of signals including • Alert tone • Evacuation message • Taped, digitized , or live voice • Evacuation tone
(d) Shall be able to communicate with the entire hotel as well as selected areas such as lobbies, elevator cars, hotel guestroomlsuites, etc.
(e) The EVAC system shall be independent of the day to day publ ic address system.
(f) Inputs from Fire Detection System • In automatic mode, the EVAC uses control signals from the fire
detection system's control outputs for automatic selection of the appropriate speaker zones.
• EVAC systems should be located in the Fire Command Center. • Manual operation of the alarm and voice communication system will
override the automatic control signals . • The highest priority is given to the master microphone's talk switch,
allowing live messages to override all other signals. • The EVAC shall be wired to override the publ ic address system . • Control inputs from the fire detection system shall be fed to the
following modules: 1. Speaker zone selection matrix to allow automatic selection of
zones to be alerted ; minimum one zone per floor. 2. Alarm tone generator. In cases where coded messages are
desired, the control signals select the codes to be broadcast. 3. Aud io amplifier increases sound level to minimum requirements
in each zone. 4. Selection switch , in cases where an automatic selection
between prerecorded messages and alarm tones is desired . • Figure 3-12 displays a block diagram of an automatically activated
EVAC system. (g) Speaker Zone Circuits
• Fire alarm and EVAC speakers are supervised by the fire alarm system.
• The circu its must be Class A wired . • If a malfunction is detected, TROUBLE ind ications must be given. • The system's internal modules, such as amplifiers , must be
supervised. Redundant modules are required in special cases . When the primary module exhibits a fault condition , the system automatically switches over to the secondary module.
3-14
• • • • • • • • • • • • • • • • •
hlM'\JAl ZOf./E SnEClION
'--+ SPEAMR Zo.'E SELECTION __ ,.."TRIX
5PEAJ<ER SUPEA\I5tON
Au rOVA1K CO,TwOl SIGN .... lS fROM FIRE OETECTIOf'; SYS'fV
S(LECTtON swncu
ALARM TO!ol£c.ENEAA TOR
.""",,, , rCl<AIOI'
"'...,"" , ;!1tO.
~-
TAPE P~"'y[R FOR PRE - RECOROIO ,veSSAG(S
Figure 3-12 - Block Diagram of An Automatically Activated Voice Communication/Evacuation System
(h) Battery Standby Power • Typically the entire system is provided with standby battery power to
allow full operation in case the main power fails. • Batteries should be rechargeable and automatically be kept
charged. • Batteries should be supervised.
3.2.4 Fire Fighter's Te/ephone System
(a) Required in buildings greater than 3 stories in height. (b) Are part of dedicated system to be used by firefighters in an emergency. (c) Provide two-way communication between the Fire Command Center
and various locations throughout the building. (d) The system consists of a master station and control unit, and separately
zoned telephones or telephone jacks. (e) The operator can communicate with any single or combination of
remote stations (maximum of 5 stations) simultaneously. (f) Remote stations are typically installed in the following locations:
• Elevators • Elevator lobbies • Near the fire fighter's entrance • Near entrances to stairwells and the exit levels • At each level of an enclosed exit stair • Emergency generator room • Fire pump room
3-15
• Designated area of refuge (g) When an emergency telephone is lifted off the hook or a portable
handset is plugged in, an audible signal is given at the master station and a display identifies the location.
(h) Figure 3-13 displays a block diagram of a Fire Fighter's Telephone System.
r----------------. D-EotCAT£O SUSSTATIONS OA JACtcS l I-IROUGHOl.,tl Tl-IE BUll OJ-lG
MASfER ST It. no"! rOR FRf MARSHAl.
HANDSETS FOR FIRa..EN
Figure 3-13 - Block Diagram of An Emergency Telephone System
3.2.5 Combination Systems
1. General Requirements/Information • Combining the various systems (fire detection, emergency voice
alarm communication, fire fighter's telephone and security alarm systems) into a single unit has many advantages - including reduction in costs, space, wiring, etc.
2. Technical Requirements/Information (a) Transponder Systems
• Rather than wiring all zones directly to the main control cabinet, the zones within a given area are connected to Remotely Located Control Panels (RLCPs). RLCPs (often called transponders, data-gathering panels, etc.) are typically connected to the central controller over a 4-wire multiplex communication network. A multiplexed system shall be capable of: 1. Relaying local fire, hold-up, or burglar alarm information
with satellite and zone location from the transponders to the central controller.
3-16
2. Transmitting switching commands for loudspeaker or telephone zones from the central controller to the transponder units.
3. Providing continuous supervision of the multiplexed communication network, the zone wiring and the transponder units themselves.
• In addition to the multiplexed communication network cable , common lines for audio signals, emergency telephone, and control power are used. Instead of using hundreds of wires in heavy multi-core cable, this method allows as few as 10 to 12 wires to carry all information for a large building.
(b) Correlation Between Initiating Device and Voice Communication Zone Switching • The main advantage in using a single microprocessor-based
integrated system package utilizing multiplex communication techniques lies in the ability to program output functions based on alarm inputs. This is often called 'control-by-vent'
• programming. • An example of such correlation is found in the 'standard' high
rise concept. This correlation makes audible evacuation signals possible on the floor where a fire was detected, as well as on the adjacent floors , with alert signals be ing sounded on other floors. With transponder systems, it is possible to program any combination and correlation, thus allowing exact ta iloring of a system to a particular building.
• In addition, modern multiplex systems allow on-site programming of a switching matrix. If a building's layout is changed or expanded, the system can then easily be adapted to the new circumstances.
(c) Manual Zone Selection With Priority • Although combination systems may perform several functions,
fire alarms must always have the highest priority. The central operating terminal then, should be programmed with the following priorit ies: 1. 1 st priority: Fire alarm 2. 2nd priority: Security 3. 3rd priority : Building Services 4. 4th priority: Supervisory Alarms 5. 5th priority: Trouble Conditions
• In case of a fire alarm, automatic zone selection based on the programmed correlation is desired. In an emergency it may be advantageous to perform manual zone selection along with transmission of live voice messages.
• In transponder systems, this is performed by arranging manual selection panels in the control room. In addition to rows of push buttons for the actual selection , built in lights indicate the zones already switched on and also the areas from which the fire alarm signals originated .
3-17
3.2.6 System Integration
1. General Requirements/Information • This section covers basic principles/concepts of combining the fire
detection and alarm systems and fire suppression and smoke venting systems.
2. Technical Requirementslln formation (a) Multiple Systems
• Most of today's fire detection control panels are microprocessor controlled .
• These systems are in a position to evaluate various types of input signals (e .g., from smoke, heat and fiame detectors, manual alarm stations, etc.) and derive from them the appropriate output or control signals.
• If multiple systems are installed , one of the following combinations may be used : 1. Signal inputs on ly (from other systems to fire detection/alarm
systems) for alerting and evacuation purposes. 2. Signal inputs to fire detection/alarm systems for alerting,
evacuation and alarm processing, and signal outputs to the other systems (in case of alarm) for control purposes
• Figure 3-14 details typical system interconnections for multiple systems.
DEl( C t.on
'-fll OOOA-~ ·PIO~ \oIO"tnOhfG
.. a"'O"b'~ 01 """" S. '-'S.- lI(,
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------ - ---
----- - - --
t .... ll!Oo4 """ ....
-------+ "'.(\1"'0-, "c.<4.L
Figure 3-14 · Typical System Interconnections
3-18
(b) Signal Inputs to Fire Detection/Alarm Systems • In addition to the input signals from the automatic detectors and
manual stations, the following signals should be fed into the fire detection control panel: 1. Sprinkler flow switches (A) 2. Sprinkler tamper switches (S) 3. Fire extinguishing and hose reel monitoring (S) (if indicated) 4. Smoke damper actuation (S)
• It is important that the alarm signals (A) and the supervisory signals (S) are treated differently, i.e., indicated and transmitted accordingly.
(c) Signal Outputs to Fire Suppression Systems • In special cases the fire detection system is used to control the
actuation of a fire suppression system (e.g., deluge system, preaction sprinkler system). Note: If the detection system is used to actuate the fire suppression system, the detection system shall be listed by a nationally recognized agency for the specific application.
• Pre-Action Sprinkler Systems 1. Used for areas exposed to either below freezing or very high
temperatures, as well as in water sensitive installations such as computer rooms.
2. As shown in Figure 3-15, when the automatic fire detector responds, the dry valve automatically opens and water is released into the pipe. The sprinkler system is now comparable to a wet system, with each head responding immediately when the actuation temperature is reached .
--------
~ .... Ot u c:r""", ~"H'''' CQN'~ .... ,
CO',-,:;o. StGN ' ~
"-' ~liO\,ll "'A -VII ~ 'f
Figure 3-15 - Principle of A Pre-Action Sprinkler System
3-19
• Deluge Systems 1. Deluge systems spray water over an entire area, as open
nozzles are installed. 2. As shown in Figure 3-16, water from an existing supply is fed
via an alarm valve to the open nozzles. In this case, these nozzles merely represent a means of distributing water, whereas fire detection is performed by the fire detection system.
ftAl C·4Jt(11Of< Sn-[>.4 <oo.-I!O. ~.,
"'fOU 10000 fllllf Of !'CTOMS
• --------
nOM ,.eoe. TRAP PRt S~A( ...... ~
I ~......,." A. Uholl ,,, (CoHI"'~\ ......
- -=;) • - "b'
Figure 3-16 - Principle of Detector Activated Deluge System (Common Activation)
I
3. Water release is controlled automatically, by the fire detection system's control unit, or manually.
4 . Water Curta in System o In cases where fire compartmentation is incomplete (e.g.
in large open halls, underground garages or escalators between floors), a water curtain system may be effective.
o A water curtain installation may be considered a fireproof division between protected and unprotected areas.
o Figure 3-17 displays the principle of water curta in protection .
Figure 3-17 - Principle of Water Curtain Protection
3-20
(d) Detector Activated Extinguishing Systems • Hotels may contain specific hazards that are unusual when
compared with the overall fire potential in the facility. Such "special areas" would include, but are not limited to:
1. Kitchen cooking equipment, exhaust hoods and ducts 2. Major computer rooms 3. Transformer switchgear and elevator equipment rooms
• When considering these special areas from a design standpoint, the unique nature of the hazards will often indicate that a "multilevel protection" approach is required to achieve the highest possible probability that a fire in one of these areas would be detected and suppressed.
• The first level of protection should be aimed at assuring that the special hazard area is designed to have as much inherent safety as possible, regardless of the presence of an automatic suppression system.
• The basic automatic fire sprinkler system installed throughout the building will generally serve as an effective fire extinguishing medium for most of these special hazard areas. Beyond that, certain special hazard extinguishing systems which are better suited to the hazard can be considered as an extra level of protection. Such special hazard systems would often be expected to respond faster than automatic sprinklers and be more effective in extinguishing the fire more quickly.
• Water spray mist and other special hazard extinguishing systems are now available for application in areas previously protected by dry chemical or gas systems. It is anticipated that other effective, less harmless gaseous systems will soon become available. Halon 1301 is no longer permitted for use in new or renovated Starwood hotels.
• Where Special Hazard Systems Are Installed: 1. The system should have a readily accessible means of
manual activation, and be clearly identified so it cannot be confused with other systems.
2. The system should be coordinated with other systems that are expected to function in case of fires or emergencies.
3. The system should be designed to automatically disconnect energy sources.
4. The electronic supervision of the protected areas and the special extinguishing systems should be an integral part of the central Detection/Alarm/Emergency Communication System.
• Planning 1. The planning and designing of dry extinguishing systems is a
very specialized task and should only be attempted by companies competent in th is field . The system must be in compliance with national , reg ional , and local codes and regulations .
3-21
2. Dry extinguishing systems which operate on the principle of oxygen exclusion such as CO2, are not permitted in Starwood properties.
• Two Zone Detector Arrangements (Cross Zoning) In order to prevent accidental discharge, the activating detectors are typically arranged to form two separate zone circuits within the area to be protected. This means that, unless both detector zones are in alarm, the gas is not released. If only one detector zone responds, a warning is given locally and at the fire detection system terminal.
• Extinguishing Event Sequence In case of a two-zone response, or if a manual alarm station in the area is activated, the following sequence of events is automatically initiated by the control unit: o The in-house intervention force is alerted. o Warning panels light up in the endangered area and audible
signals are given to evacuate the area. 1. The public fire department is automatically alerted. 2. Pre-selected electrical installations and air conditioning
systems are shut down. 3. Fire doors, dampers, and windows are closed.
o After a brief delay period, during which the extinguishing process may be manually aborted: 1. The extinguishing valve opens automatically. 2. The room is flooded with extinguishing agent.
(e) Connection to Smoke Venting or Smoke Control Systems • Dedicated systems to extract smoke and hot combustion gases
from a building are used, and may be required by national or local codes. These systems basically serve two purposes: 1. To remove smoke and toxic fumes in order to reduce the
hazard for both occupants and fire fighting personnel. 2. To let hot combustion gases escape in order to reduce the
pressure resulting from open flame fires, and to delay or inhibit flashover. Flashover occurs when certain materials such as decorations or furniture, emit combustible gases due to the heat of fire. Should this gas concentration reach a certain level and mix with oxygen, it can ignite an explosionlike flashover.
• Smoke venting systems typically consist of dampers located near the roof of a building. These dampers are often driven by pneumatic or hydraulic mechanisms which the fire department will manually activate. Other models are spring loaded and need maintenance action after they have been actuated. Activation or opening of any damper should always be annunciated at the central fire detection system display.
• Smoke control systems use electrically driven fans activated manually or by signals from the fire detection system. Upon receipt of an alarm at the control panel, all fans are shut off or air is supplied to or exhausted from parts of the building. Where fans may be exposed to high temperatures in case of fire, the fans must be constructed to withstand the extreme heat.
3-22
• The application of smoke control concepts is extremely dependent on the building construction, the air condition ing systems, and other factors . It is strongly recommended to consult the fire department and local codes and regulations before concepts are applied.
3.3 Basic Detection and Alarm Application Concepts
3.3.1 Fire Detection Systems
(a) Zoned Systems • A common zoned system is the tradit ional method for connecting
detection devices to a control unit. • Starwood requires Class A wiring for all zoned systems. • A single zone typically consists of several detectors connected to
the control unit, using a single pair of wires . • The zone shall reflect the physical layout of a building section and
shall meet local codes - often a maximum of 15,000-20,000 ft' (1393.5-1858.1 m' ). This is important because only the zone address will be displayed if one or several detectors in the zone go into alarm. The actual detector that caused the alarm must still be located by personal investigation.
• The maximum number of detectors per zone depends on the national and local regulations . For common zoned systems, this seldom exceeds 20-25 detectors. This is a function of both electrical limitations of the systems and the need for quick response.
• Manual fire alarm devices should be zoned separately so it is evident that the fire was detected by a person .
• Sprinkler system water flow alarm devices and valve supervisory switches should also be zoned separately.
(b) Addressable Detector Systems • Contain multiple devices on a common signaling line circu it, each
with its own unique address, which identifies the exact location of the detector that alarmed.
• Up to 128 detectors may be connected to a single zone line circu it, provided this meets local and national codes.
• Manual alarm stations may be zoned with the automatic devices, since the location and type of in itiating device can be identified by the fire alarm system .
• Some addressable detector systems allow the connection of control modules to the same signaling line circuits . This provides for an economical means of driving local annunciation devices, closing of fire doors or control of other local devices.
(c) Intelligent Detector Systems • Similar to addressable systems with unique address on common
circuit. • Are able to send information to and receive information from the
control panel in addition to simply reporting their location. • The benefit of this two-way communication system allows for
nuisance alarm features including sensitivity adjustment from the control panel and the transmission of "detector dirty' or
3-23
"maintenance required" signals from the detector to the control panel.
(d) Analog Reporting Detector Systems o In addition to having the features of intelligent detector systems,
have the ability to transmit changes in the conditions sensed in the detectors sensing chamber.
o Transmit the actual signal they sense to the control panel , which contains the decision making ability. This allows the sensitivity to be varied based on location, time of day, etc., and provides a means to monitor dirt accumulation over time.
o Some devices look at fire signatures, such as temperature changes, in addition to sensing the presence of smoke. This is another method used to reduce nuisance alarms.
o Some analog detector systems have the ability to automatically compensate for environmental condit ions, including dirt accumulation.
o Although the alarm thresholds are adjustable, they must still meet the limits specified by the regulatory agencies.
(e) Single Station Smoke Detector Systems o Completely self-contained, with their own buzzer, indicator and reset
mechanism. o System connected smoke detectors are required in guestrooms. o Existing single station smoke detectors may remain in use, provided
they meet the following : 1. Single station smoke detectors for guestrooms must be
approved by recognized listing agencies 2. Use of single station smoke detectors without a central ized fire
alarm system are not permitted . 3. The power supply to single station smoke detectors must be
from centralized electrical panel with non-switchable building AC circuits connected to the emergency generator.
4. Battery operated single station smoke detectors are not permitted.
(I) Special Considerations for Existing Hotels o Existing hotels sometimes carry a higher fire risk than modern
structures, due to low fire resistance (compartmentation) and materials used.
o Installation of "Regular" Fire Detection Systems 1. Installation of new fire detection systems in existing hotels
requires a lot of work . 2. It may be necessary to shutdown portions of the hotel. 3. Costs can be minimized if careful coordination of work is
planned for renovations . o Radio (Wireless) Transmission Fire Detection Systems
1. Detector/transmitter stations are battery powered only. 2. If these systems are used, must have approval of Starwood and
local authorities. 3. Reliability of these systems has not yet been proven.
3-24
3.3.2 Nuisance A/arm Problem
1. General Requirementsllnformation Nuisance alarms are a major issue for fire alarm systems. Unwanted alarms should be reduced as soon as possible.
(a) Nuisance alarms are often caused by: • Mischievous use of the system (blowing smoke at a detector,
pulling alarm stations, etc.) • Maintenance work in monitored area (welding, painting, etc.) • Deceptive phenomena (insects, dust, steam, sunlight, etc.) • Corrosion of contacts (due to environment) • Electromagnetic influence and radio frequency influence (walkie
talkies, cellular phones, etc.) • Detectors which are of the wrong type, improperly
placed/installed, dirty, etc. (b) Methods to Reduce Nuisance Alarms
• False alarms due to maintenance work can be avoided by proper organization, training and supervision.
• Due to microprocessor technologies, some fire detection equipment manufacturers have been able to incorporate nuisance reduction features into their equipment.
• Cross Zoning o Based on the concept that two separate zones must respond
before a general fire alarm signal is activated . o Response of a single zone leads to pre-alarm condition,
which is announced to in-house staff. o Recommended for areas in the hotel where there may be
heavy smoking. o Always used when detectors are used to activate
extinguishing systems. o Can be performed with either traditional zoning/devices or
intelligent devices. o For traditional zoning methods, detectors must be wired to
guarantee proper two-zone response in case of fire. o For intelligent detection systems, cross zoning may be
accomplished by careful formation of grou ps in the software. • Pre-Signal (Alarm Sequencing) Concept
o Method of alarm verification used to help reduce the chance of panic in crowded areas (retail areas, ballrooms, etc) .
o First response from a detector is "silently" announced to key personnel, who have been assigned the task of investigating the alarm.
o If a second detector responds, a general fire alarm is given . o A general alarm is also initiated if either a manual pull station
or the sprinkler system water flow switch are activated. • Alarm Verification Concept
o Applicable in areas where puffs of smoke or gas are common in the environment.
o When the detector first responds, an automatic reset command is issued and the alarm is suppressed .
3-25
o When the detector responds a second time (within a particular time period), an alarm is immediately issued.
o The time limit varies based on the manufacturer, however usually limited by local or national codes. NFPA 72 limits the time delay to 60 seconds.
o Th is concept is not applicable for heat detectors, manual alarm stations or water flow switches. An alarm from any of these devices cause a general alarm signal without delay.
• Positive Alarm Sequencing o Utilizes a dual timing principle for delaying a general alarm. o Similar in concept to cross-zoning , however requires only a
single device in alarm. o This method can only be used when a system operator is
present at all times. o The operating sequence requ ires two levels of device priority
and two system timers (T1 and T2) . 1. Priority 1 - Immediate general alarm/fire department
notification (manual alarm station, water flow device) 2. Priority 2 - Delayable alarm (smoke detector)
• When there is a response by a priority '2' detector, delay T1 is started. When T1 time runs out without a response by an operator, the fire department is called and a general alarm signal is activated. If the alarm is acknowledged while T1 is running , the system interprets this as a sign that an operator is present. In this case, timer T2 is started, allowing time for investigation.
• Time periods T1 and T2 are often regulated by local or national codes. NFPA 72 limits T1 to 15 seconds and T2 to 180 seconds.
• If the investigation verifies the existence of a fire or if time T2 runs out, the fire department can be summoned by initiating any manual alarm station.
• However, if the investigation determines that only a minor fire exists that can be extinguished easily, or that it is not an actual alarm, the fire alarm control panel can be reset while T2 is still running without sounding a general alarm.
• Sensitivity Compensation o Detector feature that maintains a constant sensitivity over
time, compensating for component aging and dirt accumulation.
o Useful in areas of high dirt bu ild-up or where detectors are difficult to access.
o This detector feature does not eliminate the need for regular detector maintenance.
o Helpful in reducing long-term maintenance costs by identifying which detectors need to be cleaned or replaced .
• Variable Sensitivity Settings o Similar in concept to sensitivity compensating detector.
Several systems have the ability to automatically or manually
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change between fixed sensitivity levels either at the detector or at the control panel.
o For intelligent detector systems, a detector may have two or more preset sensitivity levels. The control panel can be programmed to shift between the various sensitivities at specific time intervals. It is also possible to program different sensitivity levels based on the location of the devices.
o For analog reporting detector systems, the sensitivity adjustments are often made at the control panel. The sensitivity levels can be adjusted by device, groups of devices and by time of day.
o Sensitivity levels must remain in the range specified by the regulatory agencies such as UL or VdS.
o These systems are useful in facilities where various environmental cond itions exist.
• Signals Indicative of Dirty Detectors o In many of the intelligent detector systems, a signal is
provided which indicates the need to clean the detector. o Waiting for a dirty detector signal should not be used as an
alternative to scheduled maintenance. • Electromagnetic Compatibility (EMC)
o Many control units contain built-in interference protection , intended to minimize the effects of electromagnetic interference, rad io frequency interference (RFI), and electrical transients (induced voltage and current spikes).
o Level of protection is dependent on the requirements of various regulatory agencies.
o Additional protection may be required to reduce the occurrence of nuisance alarms resulting from these phenomenon .
o Refer to Appendix 3-8 for additional information on Electromagnetic Compatibility (EMC)
o Interference Factors which influence EMC include: 1. Lightning 2. High frequency or radio interference 3. Interference pulses 4. Electrical or magnetic interference fields 5. Transmission of electrical interference currents via
resistive coupling 6. Electrostatic Charging/Discharging
o Interference Protection Measures 1. All fire detection and alarm equipment must meet the
current revision of applicable standards, which require equipment to be designed with adequate EMI and RFI protection features .
2. However, some equipment may be exposed to abnormally high levels of interference.
3. Typically, the use of shielded cable or cable installed in properly grounded metallic conduit will negate a majority of the interference. In some cases, additional protection may be required .
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4, Protection is available in the form of filters or other suppression devices, which can be installed on the detection devices, on the installation wiring or at the control panel. The manufacturer should be consulted when additional protective devices are to be installed ,
5, The use of fiber optic cable instead of cable using metallic conductors provides for an alternate means of protection, Fiber optic cable are immune to EMI and RFI as they use light signals to transmit data instead of electronic signals,
o Additional Transient Protection Measures 1, All fire alarm equipment must meet the current revision of
applicable standards, By meeting these standards, the equipment is designed with adequate transient voltage protection for systems used within a single building,
2, For any circuits extended outside the building, ex1ra precautions must be taken to protect the equipment from damage caused by high voltage transients being induced on the circuits from nearby lightning strikes or other outside sources, These circuits should be run in metallic conduit that is properly bonded to a good earth ground, and external trans ient protection must be installed on each of those circuits,
3, The ex1ernal transient protection required for each circuit depends on the characteristics of the circuit and, where lightning is a concern, the degree of lightning activity expected at the geographical location of the installation,
4, If it is apparent that there will be a high degree of lightning activity at the installation, it is recommended that additional transient protection be installed on equipment to prevent damage,
5, Additional transient protection is needed on multiplex communication network lines (signaling line circuits) and audio communications lines are routed underground from building to building in PVC conduit. Twisted shielded pairs with the shield earth grounded should be used within the PVC conduit, or twisted pairs in metal conduit. Audio circuits should be shielded independently from
each other and from signal circuits , 6, When shielded cable is used, it is important that the
equipment manufacturer be contacted for specific requirements regarding termination of the shield,
7, In all cases, it is extremely important that all ground connections be made to an 8 It (2,5m) driven ground rod or equivalent water pipe connection ,
8, The equipment manufacturer should be consulted when additional transient and interference protection is required to ensure compatibility with the installed equipment.
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9. If high voltage trans ients are anticipated in advance, the installation of fiber optic cable instead of cable using metall ic conductors is an option.
3.3.3 Control Units and Terminals
(a) The control unit is the heart and brain of the fire detection system. It is important to provide an uncomplicated interface between the operator and the system.
(b) Location of Terminals • It is extremely important to properly locate the operating and display
terminals. • The code requirements and local fire marshal should be consulted
before selecting the final location. • Hotels should have a terminal at a permanently staffed location -
such as the main lobby. • It may be beneficial to have full access terminal at a central location
and remote terminals, which allow limited operation of the system. This is su itable for hotels consisting of multiple build ings and larger hotels.
• Larger hotels may also require a local ind ication panel on each floor to provide selected and detailed information, as illustrated in Figure 3-18.
' ....
'1C¢t J
.. "
..... ,.-. ."'"
- ---
I •
• • •
COlao. tOOo'I VII _ (t (tAli .
::..='"" ='=
Figure 3-18 - Typ ical Terminal Installations for Larger Buildings
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(c) Displays • Each indicator should be clearly labeled and easily understood by
hotel management and fire department personnel. Text used on the displays should be discussed with representatives of hotel management and the local fire department and agreed upon prior to system installation.
• Lamp Type Indicators and Annunciators o Indicators include alarm, trouble, supervisory, acknowledge,
reset, etc. o In many cases the flashing of the lamps indicates the status of
the panel or action to be performed. o It is important that the operator understand the meaning of the
indicators so they system can be correctly operated . • Graphic Annunciator
o Common display used in many buildings. o Graphic indication of the building is provided showing a floor
plan or build ing elevation with lamps provided indicating the area of the fire.
o The build ing graphic should be identical to the bu ilding layout. As modifications are made to the building is modified, the grapbic annunciator should be updated to reflect these changes.
• Alphanumeric Light Emitting Diode (LED) or Liquid Crystal Display (LCD) o Displays provide text information concerning the type of device
and location of the device and alarm. o Are often provided with a selector switch for scrolling through
messages. o This type of display typically provides more information than the
lamp-type annunciators. o Text should be clear, concise and accurate as to the type of
device and location of the device sending the signal. • Video (CRT) Displays
o Typically use computer monitors to display 40+ lines of text. o Able to provide much more detailed information as to the
location of the alarm, type of device in alarm and steps to be taken in the event of an alarm.
• ColorlGraphic Display o Similar to the video display, this type of system uses monitors to
display graphics of the building. o Can be used to display the bu ilding, floor plan and room of alarm
on the video monitor. o Graphics must be updated as the building is modified .
• Printers o Can be used to display alarms in emergency situations and are
also good for logging system alarms, troubles, etc.
3.3.4 Multiplex Systems
(a) Are used to connect remotely located control panels (RLCPs) throughout a hotel complex by means of digital communication network.
(b) These systems are economical if:
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• The hotel is retrofitted • The hotel contains more than approximately five control units • User friendly interfacing is desired • Large distances exist between the control units • Other functions (i.e., security, gas detection, building services) are
to be integrated into the central control unit. (c) Protocols and Event Logs
• Allow for supervision of operators and can lead to more responsible action and maintenance.
• Allow for verification and reconstruction of events after an emergency or drill.
• Typically contain the times and dates when the following events occurred: 1. All alarms 2. All acknowledging actions 3. All resetting actions 4. All fault and trouble alarms 5. Corrected faults
• Installation of at least one printer is recommended for multiplex systems.
(d) Arrangement in High-Rise Buildings • Multiplex systems are suitable for high-rise hotel buildings. • Typically economical for hotels more than 15 stories (control unit
installed on every third floor, 5 or more control units - multiplex is usually economical)
• Fire detection on the floors is achieved by detectors and manual alarm stations.
• In many cases, intelligent detector systems are preferable because they allow high zone capabilities and provide precise indication of the alarm source.
3.3.5 Auxiliary Control Outputs
(a) Auxiliary control outputs of the fire detection system are used to: • Close fire doors held open by electromagnetic devices • Close fire dampers • Control fire pumps and emergency generators • Control escalators and return elevators to designated level • Control HVAC systems • Control pressurization fans • Control the evacuation and alarm system • Control remote signaling devices
(b) Configuration of Control Outputs' • Control outputs can be available on local basis or on a central basis
via a multiplex system. • The outputs consist of changeover style contacts and allow for most
universal application and exact tailoring to a particular requirement in a hotel.
• The activation of every single control output can be made dependent on many system conditions including: 1. Devices
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2. Zone number(s) 3. Zone Status (AlarmlTrouble/Normal) 4 . Alarm Status (Acknowledged/Unacknowledged) 5. Operating Mode (Day or Night) 6. Alarm type (Fire, Security, Gas, Building Services,
Extinguishing) • Interconnection to HVAC System
o One of the major uses for control outputs is to activate the HVAC system supply and exhaust fans for smoke management.
o In most cases, these devices are simply used to turn off all fans when an alarm signal is initiated.
o These devices may also be used for smoke control or engineered smoke management systems, as discussed in NFPA 92A, Recommended Practice for Smoke Control Systems.
o Smoke management systems are used to inhibit the flow of smoke into any means of egress, exit passageways, etc.
o Two basic types of smoke management systems - shaft protection and floor protection. The selection of which system to se is based on the building, occupancy, life safety requirements, and other national and local codes.
o Shaft protection - Stair tower is pressurized to prevent or minimize smoke into the stairwell during egress and fire fighting operations. In th is type of system, the pressurization fan is activated by a control output from the fire alarm system.
o Floor protection (zoned smoke control system) - the intent is to have negative pressure within the area of alarm and positive pressure in surrounding areas. The negative pressure in the area of the fire serves to aid in the exhaust of smoke, wh ile the positive pressure in the surround ing area minimizes the migration of smoke from the fire area into other zones.
o Indicators should be provided at the Fire Command Center to show the status of the fans .
• Elevator Recall o Each elevator having a travel of 25 ft (7 .6 m) or more above or
below the designated level of fire fighter access and occupant egress should be provided with both manual and automatic elevator recall devices.
o Manual devices consist of a key activated control that recalls the elevators to the level of fire fighter access. At this point, the elevators can only be controlled manually with a dedicated key.
o Automatic elevator recall is also recommended upon activation of any manual alarm station , sprinkler system water now switch or elevator lobby smoke detectors.
o All local and national codes and regulat ions should be followed . If no such code is available , the recommended method for elevator recall and firefighter's service can be found in American National Standards Institute's Standard A 17.1 - Safety Code for Elevators and Escalators.
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3.3.6 Alarm and Emergency Voice Alarm Communication Systems
(a) General • Additional emergency planning is important for high-rise bu ildings
where exiting is difficult and conventional fire fighting methods cannot be applied.
• Buildings with active and passive fire protection measures may be able to provide a reasonable time period between the detection of a fire and the initiation of the evacuation process.
(b) Planning Considerations - The following factors should be considered: • Construction of bu ilding, its fire resistance and protection • Height of the building , number of floors and area of floors • Maximum number of occupants • Complexity, capacity and safety of egress routes • Efficiency of active measures • Effectiveness of in-house fire brigade • Efficiency and response of local fire department
(c) Staff Notification • Alarms from detection systems, waterflow sensors and manual fire
alarm systems shall be arranged to notify the hotel staff without any delay.
• Any required investigation should start immediately upon in-house staff notification.
• May be alerted by: 1. Sounding of buzzers/horns in staff areas on ly (i .e., control room,
plant room, front desk, etc.) 2. Use of paging systems 3. Pre-signal (discrete) messages over the hotel's PA system,
directed to selected personnel. • Responsibilit ies of Personnel - must be clearly identified , so each
person is aware of his/her duties in case of an alarm. Goals should include: 1. Investigate and report back to central point. 2. Initiate general alarm and alarm to fire department. Th is can be
done by activating the nearest fire alarm station. 3. Attempt to extinguish small fires using extingu ishers, hose reels,
etc. 4. Direct fire fighters to control room and location of fire . 5. Start emergency equipment where needed . 6. Assist in evacuation. 7. When the fire department arrives, they are in chargel
(d) Fire Department Notification • Typically the local fire department is located remote from the hotel. • All hotels shall have automatic alarm transmission capability to
avoid delays in notifying the fire department. • Automatic transmission of alarms shall occur upon activation of
smoke/heat detectors (excluding guestroom detectors), water flow sensors or manual pull station devices.
• Complete as-built drawings, technical service instructions, and concise operator instructions shall be readily available in the Fire Command Center. The Fire Command Center shall be located in
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the same room as the telephone switchboard and should be constantly attended by hotel staff.
• Staff members should have the ability to communicate directly with the fire department to verify alarms have been received and to provide additional information. This manual method of notification can be accomplished using the public telephone system.
• Alarm transmission methods vary. The following methods are often applied (listed in order of suggested preference): 1. Dedicated cable between the hotel and fire department, or the
central station of the alarm company, fully supervised. 2. Dedicated, DC-coupled telephone line, supervised. 3. Normal telephone line connection to the fire department,
supervised. 4. Overlay transmission over existing telephone lines for regular
use, supervised 5. Using automatic dialing equipment to dial the fire department's
dedicated telephone number in case of an alarm. • Alarm signals can be automatically transmitted to the fire
department by one of the following three methods 1. Central Station Signaling System - Operated by private alarm
companies, wh ich contract with the hotel to receive fire alarm and supervisory signals and take appropriate action.
2. Auxiliary Signaling System - Use municipal fire alarm circuits to send alarms from the hotel to the municipal communications center.
3. Remote Station Signaling System - Use electrically supervised circuits to send alarm signals from the hotel to alarm signal receiving equipment in a remote station such as a municipal fire alarm headquarters or a fire station . (NFPA 72)
• For areas using a central station at an alarm company, it may be preferable to transmit the alarm to the alarm company, who will notify the fire department.
(e) Occupant Notification • Hotel occupants shall be notified via audible/visual fire alarm signals
or the emergency voice alarm communication system, upon actuation of heat/smoke detectors (excluding guestroom detectors), water flow sensors or manual pull stations.
• Smoke detectors used for elevator recall and heat detectors used for elevator power shutdown, shall not be required to activate the hotel evacuation alarm, provided these detectors are monitored by the fire alarm system and activation of these detectors results in an audible/visible alarm in a constantly attended location.
• Detectors used for releasing devices (i.e ., door or damper closing and fan shutdown) shall not be requ ired to activate the hotel evacuation alarm.
• Design of occupant alarm must take into account the type of bu ilding and number of escape routes .
• For buildings over 3 stories in height - the floor of alarm (or fire area) and the floors (or fire areas) immediately above and below the floor of alarm shall be notified by the emergency voice communication
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system. The AHJ and local fire department shall determine if additional areas need to be notified.
• For buildings 3 stories in height or less - activation of any device shall sound the hotel evacuation system.
• Audible alarm devices shall be a minimum of 15 dBA above the ambient noise level. A slow whoop siren or other electronic tone sounded over the fire alarm rated speakers capable of supporting voice communication is required.
• Aud ible devices in guestrooms near the bed shall be 72 dBA. • Choice of Alarm Signal - Visual and audible alarm devices are
required in all Starwood hotels. 1. Uncoded (Tone) Signals
o For an uncoded alarm system, there are a number of bells, electronic sounders or other signaling devices, which provide audible signals in parts of the hotel.
o This method can only provide very limited information. A hotel guest hearing the sound is only aware that something is happening, but the location and severity of the incident is not evident.
o Not permitted in new or renovated hotels, except those less than 3 stories in height above grade, with direct exits from each guestroom to the outside.
2. Coded Signals o This method uses bells, chimes or horns to create alarm
signals by coding the signal to either indicate the location of the alarm source or alert particular staff members.
o Not permitted in new or renovated hotels, except hotels less than 3 stories in height above grade, with direct exits from each guestroom to the outside.
3. Prerecorded or Synthesized Voice Messages o Able to direct occupants to safe areas. o In international hotels, it may be necessary to repeat the
message in different languages. o Loudspeakers must be installed throughout the building and
should be zoned with other systems - to provide different messages based on the different zones.
4. Live Voice Communication o Provides an optimal means of minimizing panic, provided
that the speaker is properly trained. o Using zoned loudspeaker networks, occupants can be
directed to safety, using up-to-date information provided by the fire detection system and fire fighters in the area.
5. Evacuation Message Examples o General Alarm Condition Requiring Total Building
Evacuation "May I have your attention please. May I have your attention please. A fire alarm has been reported in the building. While this report is being verified, you are asked to proceed to the nearest stairway and walk to the ground floor. Please do not use the elevators, but proceed to the nearest
3-35
stairways . Please walk to the ground floor and leave the building."
o Evacuation of Fire Floor, Floor Above and Floor Below Fire Floor "May I have your attention please. May I have your attention please. A fire alarm has been reported in your area. While this report is being verified , you are asked to proceed to the nearest stairways and walk to the ground floor. Please do not use the elevators, but proceed to the nearest stairways. Please walk to the ground floor and leave the build ing .
o Message to the Occupants of Elevators "May I have your attention please. May I have your attention please. A fire alarm has been reported in the building and has directed all elevators to the lobby or an alternate safe floor. Once the elevator stops, leave the elevator and walk to the nearest exit and leave the bu ilding." OR "May I have your attention please. May I have your attention please. The signal tone (alarm signal) which you just heard indicates a report of a fire in the building. If your floor evacuation signal sounds after this message, proceed to the nearest sta irway exits and leave the floor. While th is report is being verified , occupants on other floors should await further instructions."
• Zoning Considerations 1. The format ion of meaningful zones impacts the effectiveness of
the alarm and emergency voice communication system. 2. General Alarm Methods
o Alarm signal sounded throughout the entire building by means of defined aud ible signal.
o Automatically activated by the fire detection system or manually in the control room.
o The total build ing alarm is not recommended for large hotels. However, general alarm signaling may be required by local codes or regulations .
3. Selective Alarm Methods o Th is method allows selective alerting and evacuation of
occupants both by zone or throughout the bu ilding as requ ired .
o In high-rise bu ildings, usually the floor where the alarm originated and adjacent floors are alerted and evacuated .
o The choice of zones to be alarmed may be pre-selected and automatically performed once the control outputs of the fire alarm system have been programmed .
(I) Emergency Voice Alarm Communication Systems • Can transmit audible tones of varying types and intensity and
spoken messages and directions. • Voice communication can be on a general (entire build ing) or, as
recommended, on a selective basis.
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• In case of simultaneous transmission of alarms and voice communications, spoken messages have priority and should override any alarm signals.
• Audio modules in an EVAC system will: 1. Drive all loudspeakers - used for both alarm signals and voice
communication 2. Synthetically generate alarm tones upon automatic initiation by
the fire direction system or manual actuation 3. Play pre-recorded messages or transmit live voice messages. 4. The entire loudspeaker network shall be supervised. The
existence of faults will result in a trouble condition. • The system can be programmed to perform the following tasks
automatically after the fire detection system is activated: 1. Transmit coded and uncoded alert signals 2. Transmit pre-arranged evacuation signals upon manual
activation 3. Transmit pre-recorded messages on a selective basis 4. Transmit live voice messages which will override other signals
• Controlled EVAC System 1. A controlled system refers to the discrimination between warning
and evacuation messages automatically transmitted to relevant areas.
2. Typically, evacuation signals are sounded in the zone in which the fire is detected - immediate danger for occupants in this zone is assumed.
3. For the adjacent areas, alert signals are transmitted to occupants to prepare them for possible evacuation.
4. The ability to manually select any combination of zones for voice messages is important, so messages can be directed to the affected areas only.
5. Loudspeakers may be activated automatically by the fire detection system, as a function of the initiating zone or manually by means of selection switches (one switch per zone, plus an 'all zones' switch).
6. Automatic zone switching can be programmed via the fire detection system as illustrated in Figure 3-19.
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WAAiUO
WAAl4IIIO'
n ........
" .... "1 fll
Figure 3-19 - Example Matrix for Warning and Evacuation Signals
(g) Alarms Via In-House Telephone Systems • Existing in-house telephone systems may sometimes be used as
interim measure to alert hotel occupants in the event of an emergency.
• This type of system should be considered a back-up or as an interim measure until a dedicated system is installed.
• When the telephone system is used , it must be capable of ring ing pre-definable groups of sets as well as all phones in the building simultaneously.
(h) Visual Alarm Devices • In addition to aud ible notification devices, all publ ic spaces (i.e.,
public restrooms, ballrooms, meeting rooms) and guestrooms for the hearing impaired must be provided with visual alarm notification devices (strobe lights).
• In areas subject to high noise levels (i.e ., machine rooms, boiler rooms), visual devices are recommended as a supplement to audible devices.
(i) Emergency Voice Alarm Communication Loudspeaker Supervision • Loudspeakers used as alarm or warn ing devices should be fire
resistant and fully supervised. • Where existing public address loudspeakers are used, it is
recommended that dedicated fire alarm speakers also be provided. • Combinations of fire alarm and background music/paging systems
should be avoided. Such combinations are only permitted if the music/paging function is part of a fully supervised emergency communication system and may be overridden at any time by a higher priority message. NFPA Style Z (Class A) supervision is required . Systems must be approved by Starwood.
• Existing public address! emergency communication systems may remain in use until a dedicated system can be installed.
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3.3.7 Selection Criteria for Evacuation Systems
(a) The central control unit of an alarm and communication system should have its own dedicated power supply.
(b) Many modern units are constructed on a modular basis so they can be tailored for a particular hotel building.
(c) Fire resistant loudspeakers in metal enclosures should be given preference. An aud io power handling capacity between 0.25 and 20 W per speaker is applicable. Multitap speakers allow easy adaptation to the sound power requirements of a particular location .
(d) Each loudspeaker zone must be monitored for fault conditions, including all wiring . Loudspeaker zones and ampl ifier output circuits should be designed so a fault in a single circuit does not affect other circuits or result in damage to the EVAC system. Class A (Style Z) wiring is required .
(e) It is acceptable for systems to reduce supervision capability when operating under emergency power. (Acceptable when done to reduce battery drain).
(I) The EVAC system front panel should conta in at least two indicators per loudspeaker zone: • Red - Zone active (selected for transmission) • Yellow -Trouble cond ition
(g) Aud io amplifiers should be of modular construction and AC/DC supervised. There should be at least one standby amplifier per four regular modules. In case of a malfunction of a regular amplifier, the stand-by unit shall take over automatically. The cond ition must be indicated at the fire alarm panel.
(h) In case of conflicting commands, the system should automatically select the correct transmission priority, accord ing to the following scheme: 1. Live voice messages via built-in microphone 2. Taped or synthesized voice messages 3. Alarm (EVAC) signals 4. Warning (alert) signals 5. Chime sound for pag ing purposes' 6. Public-address messages' 7. Background music' 'Note: 5, 6 and 7 are not recommended.
3.3.8 Emergency Handling Procedures Using EVAC Systems
The following examples demonstrate the use of modern EVAC systems to assist with emergency situations. Figure 3-20 provides an illustration of the following steps:
1. An automatic smoke detector responds to smoke phenomena. 2. The control unit initiates a pre-alarm to alert the staff; staff personnel
hurry to the scene to investigate. 3. The control unit stops the ventilation on the relevant fioor. 4. The fire develops into a serious incident. Another detector responds. 5. The control unit automatically alerts the fire department.
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6. The control unit commands the EVAC system to send alarm signals to the floor where the fire initiated and warning signals to the floors above and below.
7. The control unit automatically starts the pressurization fans for the stairwells.
8. Persons are leaving the endangered areas. Someone activates an alarm station in the staircase. Th is is annunciated at the control panel, along with the other alarms.
9. Hotel staff (who are not normally equipped with self contained breathing apparatus [SCBAj, protective clothing or other devices) rush to the scene to help with evacuation and to combat the fire if it is still in its incipient stage.
10. Automatic sprinkler system activates. 11 . The municipal fire department arrives; the commanding fire officer
analyzes the display on the control unit (location, type of responses, etc.).
12. Fire fighters rush to the scene to combat the fire. They report back to the commanding officer in the control room using the emergency telephone system.
13. The commanding officer decides to use live voice communication to first evacuate the most endangered floor, then the floors above and below, and then also the second floor above the fire.
14. The fire fighters report via the emergency telephone that the fire is under control.
15. The commanding officer halts the evacuation process by using the 'all call' feature of the EVAC system.
16. Nobody was injured, there was no panic and thanks to the early warning , damage to property is minimal.
17. Fire suppression, detection and alarm system restored to normal (sprinkler heads replaced, valves opened, hoses dried and equipment maintained, etc.).
1'-2 '0 10 i1J
12 13 14 5
Figure 3-20 - Emergency Handling with EVAC System
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3.3.9 Considerations for A/arm Organizations
(a) Alarm organization defines a 'master plan' to be executed in certain emergency situations.
(b) These actions may be executed automatically or manually. (c) Alarm organizations must meet local codes/regulations. (d) 'All Alarms Direct' Concept
• Recommended for small hotels [i.e., Roadside Inns (Type A)]. where exits and escape routes are freely accessible and the potential for panic is minimal.
• As shown in Figure 3-21, all alarms will be issued simultaneously upon a signal received from either an automatic detector (excluding guestroom smoke detectors), a manual fire station, or a sprinkler flow switch.
• Credibility of Detection Source 1. Smoke detectors in guestrooms, more than in other areas, are
often a source of nuisance alarms (due to deceptive phenomenon such as heavy smoking in a confined area , playing with a detector, etc.).
2. It is always requi red to provide a local alarm in guestrooms to alert the occupants if there is smoke in the room.
3. Because they are prone to nuisance alarms, however, guestroom smoke detectors should not sound a build ing-wide alarm.
4. In new hotels, where system connected smoke detectors are installed in guestrooms, activation should sound a supervisory signal at the control panel. In the case of guestrooms designated for persons with disabilities, this individual room identification signal can also serve to initiate a faster response for those who may need it most.
" '0\0 _ 1.( .... ·Ao~
«II r 'If.'oo' ~ .41;-.1
'/ " .00-
[!]
..... , ..... .... l'.'"
1r-7n r~
.... ~ '0', ~~'O ..o'!l ' " .....
"" ...... tu ' '''' tou" .. .. . ...... .
Figure 3-21 - Flow Chart of 'All Alarms Direct' Concept
(e) Alarm Concepts for Supervising Staff • In this concept, when an alarm from a corridor detector is activated
and the hotel staff is not present the following events occur: 1. Timer T1 in the control unit is started 2. The hotel staff is alerted by a silent alarm
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• Provided that a staff member acknowledges the alarm on the fire detection system terminal before the timer T1 has elapsed, the location and type of the alarm (as indicated by the terminal) is known. With the acknowledgement of the alarm within the time limit allowed by T1, the system will automatically: 1. Silence the horn in the control room 2. Start timer T2
• Within the time limit T2, the staff can now proceed with the investigation of the reason for the alarm.
• If the alarm was caused by a fire, the activation of any manual alarm will generate a GENERAL ALARM. Similarly, if no staff is present to acknowledge the system prior to the time-out of T1 , the system will generate a general alarm.
• If the fire was only minor and can be handled by the staff within the time limit of T2, the system can be reset before the time lapse of timer T2 and no general alarm is generated .
(f) Typical European Alarm Concept • This concept is another version of the basic idea of supervising the
in-house intervention force (investigation team). It was designed by CERBERUSAG and is used in many European hotels.
• The concept involves the in-house staff (when present) in investigating and confirming a fire alarm. These concepts are based on the following principles: 1. Activation of any manual alarm station will always alarm the fire
department directly and without delay. 2. During the unoccupied mode of operation, when availability of
staff is unlikely, all alarms from automatic detectors, including guestrooms, should alert the fire department directly.
3. During the occupied mode of operation, when staff is likely to be present, the procedures for 'staff present' and 'investigation period timing' will be followed .
3.3.10 Protection of Guests with Disabilities
(a) General • Americans with Disabilities Act (ADA) establishes guidelines for
accessibility in the United States. • Starwood requires that the provisions of the ADA relating to fire
detection, alarm and emergency communication be met for all US properties and newly constructed/renovated hotels worldwide.
(b) Measures to Protect Occupants with Disabilities in the Event of a Fire • Objectives of Protective Measures
1. The protective measures provided should give persons with disabilities the same opportunities as everyone else.
2. Occupants should be able to trigger an alarm, become aware of a fire condition, and escape or be brought to safety.
• Technical Measures in Public Areas 1. Installation of fire detection and suppression systems 2. Installation of both audible and visual emergency warning
signals.
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3. Audible devices shall be at least 15 dBA above the ambient background sound level or produce a signal which is at least 5 dBA above the maximum expected sound level for at least 60 seconds, whichever is louder.
4. Visual devices shall meet the following requirements • Shall be a xenon-strobe type or equivalent. • The color of the light shall be clear or nominal white. • In addition, the maximum pulse duration shall be 0.2
seconds, with a maximum duty cycle of 40%. (A pulse duration is defined as the time interval between initial and final points of 10% of maximum signaL)
• The intensity shall be a minimum of 75 cd. • The flash rate shall be a minimum of 1 Hz and a maximum of
3 Hz. • The device shall be 80 in . (203.2 cm) above the highest floor
level or 6 in. (15.2 cm) below the ceiling, whichever is lower. • In general , no place in any room required to have a visual
notification device shall be more than 50 ft (15.2 m) from the signal (in the horizontal plane). In rooms exceeding 100 ft (30.5 m) across, without obstructions 6 ft (1 .8 m) above the floor, devices may be placed around the perimeter of the room, provided they are spaced a maximum of 100 ft (30.5 m) apart.
• No place in common corridors or hallways in which visual devices are requ ired , shall be greater than 50 ft (15.2 m) from the signal.
• Manual fire alarm boxes must be within easy reach of persons in wheelcha irs [U.S.A. max. height = 44 in. (111 .8 cm) above the floor, other countries may permit up to 60 in. (152.4 cm) above the floor, however a maximum height of 44 in. (111 .8 cm) is recommended] .
• Technical Measures in Guestrooms 1. Designated guestrooms should be specially constructed
and equipped for persons with mobility and hearing impairments in accordance with ADA requirements. These rooms should be identified on the hotel 's "Room Management System"
2. In addition to the required fire detection, alarm and emergency communication systems, the following should be provided in guestrooms for persons with disabilities: • A dedicated 115/220 VAC outlet, connected to
emergency power. Power should be uninterrupted upon loss of normal AC voltage. The outlet should be wall-mounted at bedside.
• A fire evacuation horn with strobe light or speaker with strobe light connected to the building fire alarm system and mounted in direct view of the headboard of the bed .
• Audible alarm notification appliances of at least 15 dBA above the normal background level , or wh ich produce a signal of 5 dBA above the maximum
3-43
expected sound level, continuous for 60 seconds, whichever is louder.
• Visual alarm notification devices shall meet the following requirements : a. Shall be a xenon-strobe type or equivalent. b. The color of the light shall be clear or nominal
white. c. In addition, the maximum pulse duration shall be
0.2 seconds, with a maximum duty cycle of 40%. (A pulse duration is defined as the time interval between initial and final points of 10% of maximum signaL)
d. The intensity shall be a minimum of 75 cd . e. The nash rate shall be a minimum of 1 Hz and a
maximum of 3 Hz. f. The device shall be 80 in. above the highest noor
level or 6 in. below the ceiling, whichever is lower. g. In general , no place in any room required to have
a visual notification device shall be more than 50 ft from the signal (in the horizontal plane).
3.4 Planning for Fire Detection and Alarm Systems
3.4.1 Procedure for Planning a Fire Detection System
The fire detection system must be planned as part of the total fire protection system outlined in Starwood Fire Safety Standards.
(a) National, Local and Starwood Requirements • The national and local regulations with which the hotel must comply
need to be identified at the beginning of the design process. The requirements contained in these standards must be followed in addition to Starwood requirements . Where conflicts exist, the most restrictive requirements govern.
(b) Ex1ent of Monitoring • The extent of monitoring refers to which fire detection devices are
connected to the central fire alarm system. • Complete Central Monitoring
o Required in all Starwood properties o The entire bu ilding is monitored by the central fire alarm system
for fire conditions. Typically includes - system connected smoke detectors in public areas, corridors, back of house spaces and guestrooms, and monitoring of sprinkler system water now and tamper switches installed throughout the hotel.
o The following areas must always be monitored (whether a completely monitored or partially monitored systems is used): 1. Service rooms, workshops, storage areas, etc. 2. Laundries (including laundries on guestroom noors) 3. Elevator lobbies and machine rooms 4. Escape routes 5. Electrical , mechanical and telephone equipment rooms
3-44
6. Lobbies and concierge areas 7. Guestrooms (may not be centrally monitored in existing
hotels) • Partial Central Monitoring
o Not permitted in new hotel construction. o With partial monitoring, guestroom smoke detectors may be
excluded from monitoring by the central alarm system. o Partial monitoring may be used as an interim measure in
existing hotels. However when planning for future upgrades, should take into account the feasibility of expansion to complete monitoring system.
• Object Monitoring o In addition to the monitoring of specific areas, it can be
beneficial to monitor equipment, such as transformers, electrical cabinets or motors, by installing a detector in their immediate vicinity.
o Object monitoring helps to detect fire/smoke from a high risk object in the early stages, allowing time to implement countermeasures and thus possibly avoiding damage.
o For hotels, object monitoring should only be used as a complement to complete area monitoring .
o If a specific detector orientation must be used, the detector must be listed for the purpose.
(c) Zoning Considerations • When a smoke detector or manual alarm station, initiates an alarm,
the central fire alarm system must indicate the precise location of the alarm. Since several devices may be connected to form groups, zoning must done in such a way that it allows easy recognition of building locations.
• The following shall be considered when establishing fire alarm zones: 1. No zone is permitted to exceed code requirements (local or
national) for area covered. 2. No zone should cover more than a single fire compartment. 3. A detection zone should be limited to one floor (with the
exception of stairwells, elevator shafts, etc, which should always have their own zone).
4. Manual alarm stations should be zoned separately from automatic detectors
5. Sprinkler water flow switches should be zoned separately. 6. Raised floors, spaces above suspended ceilings, and air
cond itioning systems must be zoned separately. 7. Guestrooms and escape routes (corridors, stairwells, etc.) must
not be combined in the same zone. 8. Detectors in rooms that present a particular fire hazard, and
detectors in rooms with low risk should not be combined in the same zone.
9. In systems using standard detection devices, no zone should consist of more than 25 detectors.
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10. In systems using intelligent detection devices, a line should have no more than 90% of the allowable devices connected to it, with a maximum of 120 devices in total.
• Regionalnocal codes should be consulted for detector zone configuration. The fire department should also be contacted for input.
(d) Selection of Fire Detection Devices • The first priority in detection device selection for hotels is the
protection of life. • The goal is to detect a fire in the earliest possible stage, while
limiting the number of nuisance alarms. • Incipient Fire Detection Systems
o Provide very early warning of fire situation. o Use air sampling networks, which provide flexibility in the
application of the systems for large or geometrically alterable areas (i.e., ballrooms)
o Sampling ports can be located throughout an area. o Fire detection systems are recommended for use in the following
areas: 1. Atria 2. Ballrooms 3. Convention Halls
o Manufacturer of the equipment and fire protection engineer should be consulted during system design
• Spot-Type Smoke Detection Systems o Smoke detectors vary in sensitivity - some have a greater
tolerance for environmental disturbances than others, but are less responsive to actual combustion products.
o In general, optical (photoelectric type) smoke detectors with a 2.5% to 4% obscuration per foot sensitivity are recommended for the hotel environment. This should be reviewed with the fire protection engineer.
o To minimize nuisance alarms, smoke detectors should not be located in locations subject to the conditions described below: 1. Humidity in excess of 85% RH (no condensation) 2. Air currents in excess of 15 ftls (4 .8 m/s) (except for certain
types of optical detectors) 3. Environment is excessively dirty, greasy or wet 4. Vapors and gases from welding or brazing processes are
present o Smoke detectors are not recommended for the following areas:
1. Commercial kitchens and food prep areas where cooking takes place [do not mount within 30 ft (9.1 m) of kitchen areas]
2. Kitchen areas in hotel suites 3. Garages
o Smoke detectors are required in the following areas, however nuisance alarm features must be employed: 1. Areas with decorative open fires (fireplaces, etc.) 2. Rooms with low ceilings [below 9 ft (2 .7 m)]- Use of
detectors with built-in signal integration or detector which
3-46
employ alarm verification features are recommended. These features prevent the transmission of an alarm condition , unless the smoke detected is present for a set period of time, usually between 10-30 seconds.
3. Mechanical workshops and technical plant rooms 4. Elevator machine rooms 5. Lounges, restaurants, nightclubs, etc., physically separated
from constantly attended areas - complete smoke detection coverage (employing nuisance alarm reduct ion strategies) is required . Exception - In lounges, restaurants, nightclubs, etc., located in open areas, unseparated by walls from main lobbies, smoke detection may be omitted if the hotel is fully sprinklered, primary exits do not end in the lobby, and the adjacent lobby has staff in attendance 24 hours a day. For these situations, it is expected that the staff will detect fires and that egress from these areas will not be obstructed by smoke should the fire grow.
o Detectors with adjustable sensitivity may be suitable to reduce nuisance alarms in problem areas, as these detectors may be fine-tuned to the environment.
o The sensitivity of an ionization smoke detector may be affected by high altitudes. For hotels more than 4500 ft (1371.6 m) above sea level, the detector manufacturer should be consulted .
o The location and spacing of smoke detectors shall meet the requ irements of NFPA 72.
o Factors that influence the location and spacing of smoke detectors include the following : 1. Ceiling shape and surface 2. Ceiling height 3. Ventilation 4. Burning characteristics of combustibles
• Heat Detection Systems o Most common detectors include rate of rise and fixed
temperature devices. o These devices are suitable for most areas where smoke
detectors are restricted . o It should be noted that heat detectors respond at a much later
time during fire development than smoke detectors (about the same time as fast response sprinkler head). Therefore , they are not suitable for areas where early warn ing is important.
o For fully sprinklered facilities, heat detectors are not requ ired in: 1. Kitchens (unless used to actuate extinguishing systems) 2. Parking Garages
o Heat detectors are required in: 1. Elevator machine rooms 2. Transformer rooms 3. Emergency generator rooms and other rooms/areas not
provided with automatic sprinkler protection where smoke detectors are not permitted .
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o Heat detectors are not recommend in rooms with a ceiling height greater than 22.5 ft (6.9 m) or where smoldering rather than open-flame type fires can be expected.
o Rate of rise heat detectors may produce false alarms where installed above heaters, ovens, fryers, steam pipes, etc.
e The location and spacing of heat detectors shall meet the requirements of NFPA 72.
(e) Arrangement of Fire Detection Devices o The location and spacing of all detection devices shall meet the
requirements of NFPA 72. o The area to be monitored by each detection device and its location
are important for early fire detection . o Monitored Area (Am)
o The area to be monitored by a particular detector is impacted by the manner of fire phenomena (smoke, heat and radiation) spread.
o In general, the smaller the monitored area per detector, the shorter the distance from the fire to the detector, the more sensitive the fire detection system will be.
e Influence of Room Height
\ ..
1. The higher a room is, the greater the distance between the fire and the detector in which larger clouds of uniform smoke concentration can be found .
2. As illustrated in Figure 3-23, with increasing room height, the monitored area per detector may also increase.
3. However, the sensitivity of the system will be reduced as the smoke concentration in the air will be less, due to the greater volume.
/
•
Figure 3-23 • Monitored Area (Am) as a Function of Room Height (h)
o Selection of Monitored Area (Am) 1. Example 1 - Selection of Monitored Area (Am) by device
This section describes one method of selecting Am. Using this method, an appropriate risk factor (1, 2 or 3) and ceiling
3-48
( II) 9'.4 ..
height must be selected. The risk factor is based on the fuel loading, type of fuel, anticipated size of fire, and use of rooms, with 1 being the highest risk and 3 being the lowest risk.
n .• ,of--+- - - - - - -.!..-H- - - -+-1-I ... ,
,,.. , ... 26..2: •
19.'7 •
16.4
... >
... , -
Assumptions:
Flat ceiling Room height = 12 ft (3.6 m) Risk Factor = 2
Acceptable Monitored Area = 490 to 860 ft2 (45.5 to 79.9 m2)
If a risk factor of 3 was used, the monitored area could be increased to 1080 ft2 (100.4 m2).
2. Example 2 - Selection of Monitored Area (am) Included in NFPA 72, National Fire Alarm Code is an Engineering Guide for Automatic Fire Detector Spacing (Appendix) . This guide provides a means for determining the area of coverage by providing installed spacing guidelines for the detector based on the ceiling height, the fire growth rate anticipated and the size of fire at the time of detection.
In all cases, the guide does not recommend that the installed spacing be less than 30 ft (9 .1 m) on center, unless eng ineering judgement shows that such reduced spacing would be a benefit. This statement is based on the theory in
3-49
--~ -.> ... -~ < --/. 0 • -:l
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most cases, will not significantly increase the time of detection. Also, the increase in the amount of detectors in a given space may increase the probability of nuisance alarms.
For rooms or spaces with higher ceiling heights, cons iderable increases over the 30 ft (9 .1 m) spacing is allowable. This is illustrated in Figure E-1 , Figure E-2, and Figure E-3.
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3~51
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Figure E-3
3-52
For example, if we were to select a ballroom with a 20 ft (6.1 m) ceiling, and we wanted to detect a 500 BTUls (530 kW) medium growth rate fire, using Figure E-2 we see that the allowable spacing can be increased to approximately 40 ft (12.2 m) on center, provid ing a monitored area of 1,600 ft' (148.6 m').
The rule of thumb, when using NFPA 72, is to install smoke detectors at 30 ft (9. 1 m) on center spacing, providing an area coverage of 900 ft' (83.6 m') per device. (This can be increased somewhat for special configurations such as corridors as allowed in NFPA 72.) Any deviation from this spacing should only be made as a result of a complete risk analysis and engineering evaluation of the unique situation at hand by a qualified fire protection engineer.
o Influence of Ventilation 1. In ventilated rooms, the 'natural' spread of smoke is
disrupted. 2. The more frequently the air is exchanged, the lower the
concentration of products of combustion. 3. The partial dispersion of smoke leads to reduced response
sensitivity. This can be compensated for by reducing the monitored area per detector or by increasing detector sensitivity (within allowable limits).
4. Table 3-2 specifies reduction factors for Am, which can be used to determine the reduced area per detector.
Table 3-2 - Reduction Factors for Am, Due to Influence of Ventilation
AIR CHANGES PER HOUR REDUCTION FACTOR FOR Am
More than 10, Less than 20 0.9
More than 20, Less than 30 0.8
More than 30, Less than 40 0.7 More than 40, Less than 50 0.6
More than 50 0.5
o Maximum Distances Between Detectors 1. The maximum distance between detectors and walls can be
calculated either as a function of the monitored area (Am) or by guidelines provided in such standards as NFPA 72. The following describes an alternative method to NFPA 72 for use in locations where NFPA standards are not used or referenced.
2. As illustrated in Figure 3-24, in principle, each detector monitors a circular area Am. Therefore the maximum distance between detectors can be estimated by the diameter.
3-53
• • •
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Figure 3-24 - Approximation of Am
3. However, building areas are rarely circular. A rectangle can be drawn around the circle, where the diameter of the circle is either the length or the width the rectangle . The other dimension needs to be reduced so the rectangle falls within the area of the circle.
o If the maximum distance between detectors is required, due to ceiling geometry or obstructions, the maximum area Am must always be maintained.
o Figure 3-25 and Figure 3-26 illustrate the maximum distance between detectors and walls.
-
- D
MaJOmum utilization 01 "stance between deteclorl
Dma .. . s. 1 2 • .JAm
Figure 3-25 - Maximum Distances Between Detectors
3-54
o. , .
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Figure 3·26 • Determining Distances to Walls
o Examples for the determination of detector spacing are included in Figure 3·27 and Figure 3·28.
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Figure 3·28 • Example for Determination of Detector Spacing (Metric)
3·55
NOTE:
o Detectors Mounted on Walls 1. In some instances (such as hotel guestrooms) it is desirable
to mount smoke detectors on walls instead of the ceiling . 2. Fire tests have shown that the response of a smoke detector
mounted on a wall varies only slightly compared to one mounted on the ceiling. Response is dependent on such factors as the relationship between the detector and the fire, the ventilation, the type of detector, and the detector manufacturer.
3. Figure 3-29 details recommendations for detector placement on wall s.
MIN .. IN
1-- 10 0 1-
ACCEPTABLE HERE
NEVER
TOP OF DETECTOR ACCEPTABLE HERE
" IN 10 eM
MIN
12 IN 30 CM
.\lAX
MEASUREMENTS SHOWN ARE TO THE CLOSEST EDGE OF TilE DETECTOR.
Figure 3-29 - Guidelines for Wall Mounted Smoke Detectors
o If detectors are to be wall mounted, the fire department should first be consulted to determine whether this is permitted by local codes and regulations.
o Minimum Distances to Building Structures • Walls /Partitions - As shown in Figure 3-30, ceiling
mounted , spot type detectors should be mounted at least 12 in. (30.5 cm) from any wall or partition .
..
II is leconwnenc:h d thai • minimum di~ance of 12 inches (3Oem) be kept 10 any w~J\$ or watl- like shudufU
Figure 3-30 - Minimum Distance to Wall
3-56
h
o Structural Elements - As illustrated in Figure 3-31 , at least 16 in. (40.6 cm) should be maintained between deteclors and structural elements, such as girders or ventilation ducts, wh ich protrude more than 6 in. (15.2 cm) below the ceiling.
, s ""
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Figure 3-31 - Minimum Distance to Structural Elements
o Storage Racks, Stored Goods - As shown in Figure 3-32, racks or stored goods must be classified as walls if they are within 18 in. (45 .7 cm) of the ceiling.
h,
Racks or stored goods that extend towards the ceiling can obstrUC1 distri>vtion and must be considered as woOs ~ h, is less than '8 inches (45.7cm)
Figure 3-32 - Minimum Clearance to Stored Items
o Influence of Roof Structures - If a roof structure is connected to a monitored room and exceeds 10% of the total ceiling area, it must be regarded as a separate room.
o Suspended Ceilings with Grid Patterns - Commonly used to hotels for decorative purposes. These arrangements allow various amounts of smoke penetration and also influence smoke spread. 1. Open Ceilings - An accessible dropped ceiling shall be
considered "open" if at least Yo of the surface is uncovered by lattice work . If the openings are relatively small and cover more than Yo of the area, the ceiling is considered 'closed' and the spaces above and below must be monitored separately. If the fire protection
3-57
engineer is convinced that smoke can penetrate the open ceiling sufficiently, it may be adequate to install smoke detectors above the dropped ceiling only. The maximum area (Am) depends on the distance between the floor and the lattice work.
2. Smoldering Fires - Typically produce little heat and therefore provide no significant thermal air current to distribute smoke. For these types of fires, smoke may not reach the detector even if the ceiling openings are generously proportioned. The use of a second level of smoke detectors below the lattice work is recommended. Optical detectors are found to be the most suitable for this type of application.
• Galleries and Inside Balconies - If a gallery-like structure penetrates inside a monitored space, the area below must be monitored by separate smoke detectors. (Figure 3-33)
ClttCtOliS _ l 1M' UOoMIII) a",o.aAuUtI ' 0111 I.Al CONI'S AS $toO""' •• IS wo-t T"""-'t J "II '
" ..
h
Figure 3-33 - Monitoring the Area Below Galleries
• Suspended Ceilings with Restricted Smoke Partitions -As illustrated in Figure 3-34, where ceilings or light fittings restrict smoke penetration, detectors must be installed slightly lower than the ceiling and project into the space below the ceil ing. In all cases, detector mounting must meet the manufacturer's recommendations and applicable codes and standards.
. .. .
Figure 3-34 - Siting Detectors in Cases of Restricted Smoke Penetration
o Ventilated and Air Conditioned Spaces
3-58
o Smoke detectors installed in ventilated and air conditioned spaces must be installed with sufficient sensitivity to detect smoke even if all fans are switched off.
o Figure 3-35 provides recommendations for locating smoke detectors in ventilated areas.
o Return air monitoring can be accomplished with duct sensors as illustrated in Figure 3-36 .
• '''ESt4 AI"" ~ ~ OIf,-\ISlIl') ACJtO~1 THI ((~ "UC' Of tiC ,(lilt, Sl"'-"'C UI1C4U.. 0( 1'111([" nc UII ~l TS
--f -f-
• •
,,..
• '''I~ ..-" "7 WUl:) r-OVGr Oi.l n. r",nli Cn.""'. ""~l Nf oUiCA Oil foI .';OV to fll I I It ,,~) 11801/l tACH Ol Tl (lOA ... , 1It4O_
_ '.'$ro ~ 6 $l,;H~. O I T ~A..q 01 "''''u. G.CIl.lI '. ~" C( CCUC1O'JS ,, : U AST S H(' ~ , ... (tIl, N(; "" I00<I ......
Figure 3-35 - Siting of Detectors in Ventilated Areas
3-59
- -
L" . ..: 1 1oI¢-''' ' 0'1"';' "-"
• t>il AlA Ih hll .oe . Ii DC ... "":;": 0 ¥OIIIf II"IAIO )0 l....t.i H_ ~. : ... V'U Of ..... ,.,. v. ... ". ... o:. e.-A""&fil' ,.,.,,. IIlTVl'''''P OUC' 1\ 1I[,,~w("OtO
"
•
~ ... rtf 6 ,,,t_ACfID ... C"¢~~ I>~ t .. pt l u,.,.. .. ~PPl Y 11'(0..._ ..... :H: '(ClOP looI'M ~U
, _OullP. .... 1$ I j[ 1""'~ Itl"l • ., "" ......... ..,.. .,.,.\. \4."', ot ItC IOI'I'S '1'"01.. 0" ,.. AU Ci " . OCA IICIf ... ,III'" LNAI'I .... rt OW. of "Pt<._
, I", 1~ ~ 6 (>;'''AC'(O ... 1t"'L '"""lU, .nil t1flcov..AJI ~hCI~ ~' ''' rl\c'C •• I~ ..... 04\ ,,-"'.,....l .." UUPt."G C .. 4V8'-Jlt .... 1>4 "f n.. ... ~ .~ OI.C·,
Figure 3-36 - Siting of Detectors in Ventilated Areas (Return Air)
o Special Areas 1. Laundry and Dry Cleaning Facilities
• All laundry areas must be fully sprinklered. • It is recommended that these areas have their own self
contained ventilation/air conditioning systems with automatically closing fire dampers to prevent smoke migration .
2. Trash Refuse Areas • These areas should be self-contained fire compartments,
with no connections to guestroom areas. • Shall be completely protected by automatic sprinklers. • Ventilation and air conditioning ducts serving refuse
collection areas must have automatically operating fire
3-60
dampers and should not connect to other areas in the hotel.
3. Battery Rooms • Are common in hotels where emergency power is
provided, especially for the phone and computer equipment.
• The danger of corrosion and explosion must be considered when selecting detectors and planning detector arrangements.
4. Refuse and Linen Chutes • Great amounts of dirt and dust accumulation can be
expected in these areas. • Automatic sprinkler protection is required for linen
chutes. 5. Garages
• Enclosed garages are considered high risk areas, especially if they are located underground.
• Automatic sprinkler protection is required . • These areas also present a hazard to human life
because of the potential for smoke development and the danger of panic resulting from difficu lt escape routes. Clear escape route identification is a vital necessity.
• Smoke detectors are not permitted. If detection is requ ired in lieu of automatic sprinklers, heat detectors must be used.
• Adequate ventilation must also be provided to prevent the bu ild up of carbon monoxide.
6. Computer Rooms, Telephone Exchange, Telex Rooms • Risks and fire loads can be relatively low in these areas,
however the value of the installed equipment is extremely high.
• Automatic sprinkler protection and smoke detection is required .
• Air sampling type detection systems provide the best coverage in terms of fastest response and immunity to ambient conditions.
• As an alternative, linear beam type smoke detectors or spot type smoke detectors installed with reduced spacing can be considered. These alternatives may result in significantly slower response times due to the ambient room conditions . To increase this time somewhat, detectors with higher sensitivities could be used . To min imize potential nuisance alarms, spot type smoke detectors employing a pre-alert signal feature (based on percent of smoke obscuration sensed) should be considered.
• The cable area under raised ftoors must be considered in add ition to the room area.
3-61
7. Technical Plant Rooms • May be treated as normal rooms, provided these areas
are clean and have no excessive air movement. • Special consideration should be given to any electrical
and electronic cabinets in the area. 8. Stairwells
", · et ,I, DliiXi O!'l (fiX. - - TlfD oa ,0\1..,.. ~.
(Of lAW,}
,,*1"101
Figure 3-37 - Mounting Detectors in Stairwells
• Exit stairwells are often the primary escape routes in hotel bu ildings.
• At least one detector is requ ired on the top floor ceiling of any sta irwell.
• If the upper floors are separated from the lower ones by smoke barriers or fire doors within the stairwell , then detectors must be installed in each stairwell smoke compartment.
9. Heating Plants and Boiler Rooms • Automatic sprinkler protection is required . • Smoke detection is strongly recommended.
3-62
10. Fuel Storage Areas • Oil storage tank rooms are required to be protected by
automatic sprinklers. • Unless a danger potential exists due to ignition sources
(such as electrical installations, light fixtures, etc.), monitoring is only necessary for pump areas and support rooms.
• Unit monitoring of individual equipment can be considered if a potential problem is identified.
11 . Risers and Supply Shafts • Risers, supply and elevator shafts need not be monitored
by smoke detectors if the build ing is fully protected with automatic sprinklers and provided with area smoke detectors (unless specifically required by local codes or standards) .
• Where sprinklers are not provided in vertical shafts and sloping ducts with an incline of less than 75", smoke spread is usually obstructed by service platforms, fixtures, etc., therefore smoke detection is recommended . The detectors should be installed as follows: o At least one detector shall be installed at the highest
point in the shaft, where smoke is likely to accumulate.
o One detector at least every 25 ft (7.6 m), or beneath each fireproof partition . (The distance of 25 ft (7.6 m) per detector may be increased to 45 ft (13.7 m) if the angle of slope is less than 75" .)
• The application of linear beam type detectors should be considered .
12. Elevator Shafts • At least one smoke detector instal led in the elevator
equipment room is required to initiate elevator recall. • Installation of smoke detectors in elevator shafts is not
recommended , as monitoring of the elevator shaft and maintenance of the detectors are difficult.
13. Suspended Ceilings and Raised Floors • Where areas above false suspended ceilings and below
raised floors are required to be monitored, maximum monitored areas can be obtained from Tab/e 3-3.
Table 3-3 - Monitored Area for Suspended Ceilings/Raised Floors
Depth of Suspended Ceiling/Raised Floor Maximum Monitored Area
< 1 ft (0.3 m) 270 ft' (25.1 m' )
1 ft to 3 ft (0.3 to 0.9 m) 430 ft' (39.9 m' )
> 3 ft (0.9 m) 650 ft' (60.4 m' )
3-63
14. Corridors • In general, detectors should not be spaced more than 30
It (9.1 m) apart, and not more than 15 It (4 .6 m) from any wall. However, in corridors not wider than 10 It (3 m), the maximum distance between detectors may be extended to 41 It (12.5 m).
15. Kitchens, Cooking Kettles and Deep Fryers • Large cooking kettles , frying pans, and deep fryers
represent a very serious fire hazard in hotel kitchens. • The installation of an automatic fire extinguishing system
is mandatory, therefore additional detection is not required .
• If additional detection is desired, fixed temperature heat detectors are best suited for the application. Smoke detectors are not recommended for monitoring these areas.
16. Atria • Atria present unique fire detection/suppression problems
due to their physical arrangement. Because of the high ceilings generally associated with atrias, spot-type detection is usually not feasible. Appropriate detection devices include linear beam type smoke detectors or incipient (air sampling) type fire detection systems.
• Linear beam type smoke detectors can be used in a number of ways. In any case, the manufacturer should be consulted for proper application and installation of these devices. o They can be installed horizontally across the atria at
various levels accounting for smoke stratification which may occur due to HVAC system features and possible thermal gradients.
o They can be set-up at angles looking vertically along the height of the atria. In this manner, depending upon the height of the atria, a set (or sets) of linear beam detectors can provide complete coverage of the atria from top to bottom.
• Incipient (air sampling) type fire detection systems can be also used for the protection of atrias. o Air sampling ports can be run along the height of the
atria providing sampling at various levels. o Where air return or exhaust fans are in continuous
operation, sampling ports can also be provided within the HVAC ductwork servicing the atria .
o The equipment manufacturer should be consulted and the hotel's energy conservation modes should be reviewed conceming proper application and installation of such devices in this particular application.
• Where obstructions are anticipated in an atria the use of an incipient fire detection system is recommended .
3-64
• Some hotels may be configured such that guestroom egress corridors are open to an atria . This configuration could result in a delay in identifying the room, or even floor of origin due to the wide open space of the atria . Because of this, system connected guestroom smoke detectors with individually reporting addresses are required in all hotels which have egress corridors open to an atria. Existing hotels with this configuration (egress corridors open to an atria) where single station smoke detectors are provided in the guestrooms must be upgraded to system connected smoke detectors in the guestrooms at the earliest feasible time.
• Smoke detectors are not required in the egress corridor open to the atria provided that adequate area smoke detection is provided in the atria, or an alternate egress route (protected by automatic sprinklers and smoke detectors) is provided from each guestroom.
• Any request for deviation from these requirements must be forwarded, with appropriate engineering rationale from the project's fire protection engineer in writing , for review. The engineering rationale must include factors such as the volume of the atria , and the fuel loading and air movement in the atria .
(f) Practical Planning Examples • Protection of Typical Guestrooms
o Early warning capability and the avoidance of false alarms must be considered.
o Critical Zone 1. Consists of the bed and its immediate surroundings. 2. Not only is there a high fuel load and great potential for
smoke production, but also a major source of fire outbreaks. 3. A person lying in bed (and most likely asleep) is more
vulnerable than in other zones in the guestroom. o Detector Arrangements
1. Smoke detectors (ionization or optical type) are recommended for protecting the critical zone in guestrooms.
2. The detector should be installed as far away as possible from potential sources of deceptive phenomena, including -air cond itioning units, bathroom door, and sitting areas.
3. For new construction , the detector is required to be system connected and recommended to be individually addressable.
4. For typical one-bed guestrooms, a single detector of high quality and stability may be sufficient.
5. For su ites or larger rooms, it may be advisable to use a multi-detector arrangement, covering the entire bed zone(s). If a guest su ite consists of two rooms, separated by a closable door, installation of a smoke detector in each room is recommended .
6. Unless individually identifiable detectors are used, it is recommended that each guest room detector be fitted with a
3-65
remote response indicator, mounted outside the room and visible from the corridor. This will help identify an individual room quickly.
7. It is preferred that detectors be installed on the ceiling, at least 12 in. (30 cm) away from walls or obstructions. However, the detector may also be mounted on the wall.
o Other Zones 1. Bathrooms - Due to potential deceptive phenomena (i.e .,
steam, hair spray), these areas are rarely monitored. 2. Entrances and Closets - Although there is potential for
high fuel load, these areas are rarely monitored as the bedroom detector is expected to protect these spaces.
3. Living Area of the Guestroom - Typically the risk associated with this area is relatively low and the bedroom detector is expected to protect this area.
(g) Zoning of Emergency Voice Alarm Communication Systems 1. General lnformation/Requirements
• The basic concept of the alarm and communication system must be discussed with the local fire department to develop an appropriate philosophy that complies with local codes and approved procedures.
2. Technical Information/Requirements • Choice of Messages
o Alarm Messages - All alarm signals should be selected and specified in cooperation with the local fire department and in accordance with national codes.
o Voice Communication 1. Required in all Starwood properties. 2. This system allows the giving of clear directions to
occupants in emergency situations. 3. Pre-taped messages may be usefu l, especially when the
Fire Command Center is initially unmanned. o Recommended Systems (see Figure 3-38)
1. Class A (Roadside Hotel) and Class B with less than 3 stories (Regional Hotel) - General alarm and voice communication system
2. All Other Buildings - Selective alarm and voice communication system
3. A emergency voice alarm communication system may not be required in buildings less than 3 stories in height above grade with direct exits from each guestroom to the outside (no interior, enclosed egress corridor).
3-66
Tht ~ ,'Qt. of. hoU' b ' jng ... nout ' 'II r~ not. dlCi6ng 18':b" 'fIIt .. n. O:Wf" to p'"fh bB~ trap; I" ¥I .. ..... low-fi .. boo? '9 ..... oft.n OONtNded of matOti! IS witt1 r.a.dwJy looN flrt ,u Wence .• 6gh-iiM t\:)loI&. t 8 :el.M of their beet., irlrastruch.re (hIgMt tire resie'.rw:. ~ wd ""g'f vtf O'Utt If. ott"" haw ben., trtjn.:I trrfl'OYII. end lhM olin (~) ,.. bOgtde.
I
AOAOS*OE HOUl AEOIOtW. HOm IoIiTROPOUT NI HOTE\. HlGH·RlSE HOTEl a .. u s A a.ASS' cvss e CUSID
kCGKT: HOO'lT. """"'" 2 • • ...., "'5'CI~ SiC> 11 It C I' a """l 11 It '" h) .,." ...
'VX 2 SI<:R U u ,lJl ' $TC FiU ... ,TO l'i U 7 STORES rod _
... . • (Wi ! ,
. S-(Wi'
. r-... 0 p(. t Mod'I " flip .. I., Ie :1)
''-IN o,p. t+A:J, 'I
. " , 2 ! • C t -d.,P! IV ·
, 'Od , "d .., ., ... . t4.
Figure 3·38 - Recommended Systems for Rescue and Evacuation
o Alarm Notification Devices for Voice Communication Systems o Loudspeakers are used as alarm notification devices for
emergency and voice alarm communication systems. o Should have a power handling capacity between 0.25 and
15 watts (nominal). o The sit ing of loudspeakers shall be performed by trained
personnel. The loudspeakers should still be audible after all fire doors have been closed.
o Alarm devices should be installed such that un iform alarm sound levels are maintained throughout an area. Therefore it is preferable to distribute several alarm devices, rather than to use fewer units with high sound power.
o Separate speakers in guestrooms are required by Starwood in all new construction and recommended in existing hotels.
o To ensure that audible evacuation signals are heard, NFPA recommends that the signal sound level be at least 15 dBA above the ambient noise level or 5 dBA above the maximum sound level having a duration of at least 60 seconds, measured 5 ft above the floor of the occupied room.
o Emergency Telephone Systems
3·67
o An emergency telephone system dedicated for use by firefighters is recommended for all Class C (Metropolitan Hotel) , Class D (High Rise Hotel) , and Class B with more than 2 stories (Regional Hotel) buildings.
o The exact location of the command center, substations, and phone jacks should be selected in cooperation with the local fire department.
3.5 Guidelines for Installation
3.5.1 General
1. General Information/Requirements • The installation of fire detection systems is subject to various (and
sometimes conflicting) regulations. As such, it is recommended that installation be performed by recognized/approved local contractor in compliance with system manufacturer's recommendations and engineering specifications.
2. Technicallnformation/Requirements (a) Acceptable codes for the installation of fire detection systems in
areas where no local codes exist include the following : • NEC, Article 760 (USA) • NFPA 101 - Life Safety Code (USA) • NFPA 72 - National Fire Alarm Code (USA) • VdS, DIN - Germany • FOC - Great Britain
(b) The installation must meet the general standards of workmanship and should also be aesthetically acceptable, especially in hotel buildings. The system, especially the detectors and alarm devices, should match the hotel's interior.
(c) In all cases the following guidelines shall be followed : • In the front of house area, cables are to be hidden above
suspended ceilings or in partitions. • Conduits or cables should be run in a straight manner, parallel
to walls or ceilings, preferably concealed in comers or incorporated into the decor.
3.5.2 Scope of Work for Supplier and Installer
1. Installer Requ irements (a) Install all equipment in accordance with local and national codes,
system manufacturer's recommendations, Starwood requirements and the engineering specifications.
(b) Provide all necessary installation materials as specified. (c) Perform all work necessary to install the system and repair any
damage (patch holes, firestop fire barriers, etc.) (d) Protect detectors during construction phase. (e) Provide specified warranty on material and labor.
3-68
(I) Check installation wiring for ground faults, continuity, shorts, opens, and extraneous voltages prior to connecting it to the control equipment.
(g) Conduct acceptance testing of all devices and circuits in the presence of Starwood fire protection engineer, hotel chief engineer, project engineer and local authorities.
(h) Shall not relocate devices unless approved by fi re protection engineer, system manufacturer and hotel safety representative.
2. System Manufacturer Requirements (a) Provide the installed with required equ ipment on time. (b) Provide detailed installation instructions for each component. (c) Provide drawings to specify the exact location for each component. (d) Supervise the installation, if required . (e) Commission the system and hand it over to the hotel
representatives . (I) Perform tra ining sessions for the operating staff. (g) Assist in establishing contact between the hotel and local fire
department. (h) Warranty all system components according to contract for the
specified length of time.
3.5.3 Environmental Conditions
1. Fire detection, alarm and emergency voice communication systems should be protected against ex1reme environmental conditions. The following data are recommended maximum values for environmental cond itions for the installation of detection and alarm systems. Manufacturers ' data sheets should also be consulted to determine maximum acceptable conditions.
2. Detectors (a) Ionization smoke detectors
• Operating Temperature - 32 to 100· F (0 to 35· C) • Storage Temperature - -20 to 120· F (-30 to 50· C) • Operating Humidity - <85% RH, no condensation • Storage Humidity - <95% RH (95% RF) • Air Velocity - <15 ftlsec (4.5 mise c) • Avoid - Deceptive phenomena (i.e. , dust, dirt, grease, high
altitude) (b) Photoelectric smoke detectors
• Operating Temperature - 32 to 100· F (0 to 35· C) • Storage Temperature - -20 to 120· F (-30 to 50· C) • Operating Humidity - <85% RH, no condensation • Storage Humidity - <95% RH (95% RF) • Avoid - Deceptive phenomena (i.e ., dust, dirt, grease)
(c) Differential heat detectors • Operating Temperature - 15 to 140· F (-10 to 60· C) • Storage Temperature - -20 to 120· F (-30 to 50· C) • Operating Humidity - <90% RH (90% RF) contin o
3-69
o Storage Humidity - <95% RH (95% RF) o Avoid - Deceptive phenomena (i.e., steam pipes, heaters)
(d) Fixed temperature heat detectors o Operating Temperature - -4 to 160· F (-20 to 70·C) o Storage Temperature - -20 to 120·F (-30 to 50·C) o Operating Humidity - <95% RH (95% RF) contino o Storage Humidity - <95% RH (95% RF) o Avoid - Areas where early warning is desired.
(e) Infrared name detectors o Operating Temperature - 15 to 140· F (-10 to 60· C) o Storage Temperature - -20 to 120· F (-30 to 50· C) o Operating Humidity - <85% RH, no condensation o Storage Humidity - <95% RH (95% RF) o Avoid - Excessive heat, deceptive phenomena
3. Control Units and Terminals (a) Control Units
o Operating Temperature - 32 to 100· F (0 to 35· C) o Storage Temperature - -20 to 120· F (-30 to 50·C) o Operating Humidity - <85% RH (90% RF) no condensation o Storage Humidity - <95% RH (95% RF) no condensation o Avoid - Excessive heat, condensation
(b) Terminals o Operating Temperature - 32 to 100· F (0 to 35· C) o Storage Temperature - -20 to 120· F (-30 to 50· C) o Operating Humidity - <85% RH (90% RF) no condensation o Storage Humidity - <95% RH (95% RF) no condensation o Avoid - Excessive heat, dirt, condensation
(c) Video display terminals o Operating Temperature - 32 to 100· F (0 to 35· C) o Storage Temperature - -20 to 120· F (-30 to 50·C) o Operating Humidity - <85% RH (90% RF) no condensation o Storage Humidity - <95% RH (95% RF) no condensation o Avoid - Excessive heat, dirt, condensation, sunlight
(d) Printers o Operating Temperature - 32 to 100· F (0 to 35·C) o Storage Temperature - -20 to 120· F (-30 to 50· C) o Operating Humidity - <85% RH (90% RF) no condensation o Storage Humidity - <95% RH (95% RF) no condensation o Avoid - Excessive heat, dirt, dust, condensation
(e) Graphic display terminals o Operating Temperature - 32 to 100· F (0 to 35· C) o Storage Temperature - -20 to 120· F (-30 to 50· C) o Operating Humidity - <85% RH (90% RF) no condensation o Storage Humidity - <95% RH (95% RF) no condensation o Avoid - Excessive heat, sunlight, condensation
(f) Floppy disk storage units o Operating Temperature - 32 to 100· F (0 to 35· C)
3-70
• Storage Temperature - -20 to 120'F (-30 to 50'C) • Operating Humidity - <85% RH (90% RF) no condensation • Storage Humidity - <95% RH (95% RF) no condensation • Avoid - Excessive heat, dirt, condensation
3.5.4 Wiring Guidelines
• The following guidelines are applicable for low-voltage networks (max 48 VDC).
1. Generallnformation/Requirements (a) Installation of systems are subject to extensive local regulations and
should be made by certified installers, using material readily available and commonly used.
(b) Starwood requires that wiring must be Class A for all initiating, indicating (notification) applicable circuit and signaling line circuits.
2. Technical Information/Requirements (a) Responsib ility
• The owner (through the project manager), fire protection engineer, and representative of the manufacturer of the fire detection system are responsible for ensuring correct installation and inspection of each system component.
• The manufacturer shall provide all necessary technical installation documents including floor plans and wiring diagrams.
• The project manager and fire protection engineer must determine the location of all equipment in accordance with relevant codes and system manufacturer's guidelines.
• The primary rules of wiring installation are: o Consult the manufacturer's instructions o Meet applicable codes and standards
(b) Installation Materials • Wire and Cable
o General Wiring Guidelines 1. All field wiring shall meet the requirements of local and
national codes. 2. AC power lines should never be run in the same conduit
as initiating line circuits and signaling line circuits. 3. In itiating line circuits and signaling line circuits should be
run in separate conduits from lines such as unfiltered signal circuits and audio evacuation andlor paging circuits. If this is not possible, each circuit must be individually shielded and properly grounded.
4. Avoid running initiating line circuits and signal line circuits through rooms containing electromagnetic fields. Circuits installed to protect such rooms shall be run in properly grounded metallic conduit.
5. Ensure that the wire used on all circuits is sized properly so as not to exceed the max. line resistance for the particular circuit (see Table 3-4).
3-71
Table 3-4 - Wire Resistance
American Wire Gauge (AWG) mm) Ohms/1 ,OOO ft (Ohm/305 m)
LOAD
0.5A
1.0
1.5
2.0
10
12
14
16
18
20
22
24
2.6 1.00
2.05 1.59
1.63 2.53
1.29 4.02
1.02 6.39
0.813 10.15
0.643 16.14
0.511 25.67
6. It is important that the wire size for all indicating circuits be determined on the basis of load and distance of the run (see Table 3-5).
Table 3-5 - Wiring Guidelines for Horn and Light Circuits Wire Sizes for 24 VDC Signal Circuits
Approximate Pair Distance in Feet to Last Device (Class B) or Including Return to Panel (Class A)
1BAWG 16AWG 14AWG 12AWG 10AWG* BAWG*
400' 620' 1000' 1600' 2500' 4000'
100' 300' 500' 800' 1250' 1900'
130' 210' 330' 520' 840' 1300'
100' 160' 250' 400' 620' 1000' • • • • . Note 1. Some equipment terminals can not accept wire size greater than 12AWG. Care should be taken to size
wire, device loading and distances accordingly. Note 2: 51 Conversion: 1n = O.3048m Note 3: Maximum line loss 10%
7. When twisted pairs are specified, cables with individually twisted pairs having a minimum of three twists per foot are recommended.
8. A system ground must be provided for earth detection and lightning protection for the devices as per NFPA 780.
o Microprocessor Based Control Panel Circuits 1. For signaling line circuits with intelligent reporting
devices, cables with individually twisted wires having a minimum of three twists per foot are recommended , unless specifically accepted by manufacturer's requirements.
2. If RFI (or other electromagnetic influences) are suspected, the areas should be tested using a field strength meter. Read ings should be taken at frequencies of 27 MHz, 150 MHz, 400 MHz and 800 MHz. If the signal strength exceeds 50 VIM for any of
3-72
RESISTANCE PER 1000FT WIRE PAIR
AWG (ohms)
#62 0.8 #82 1.28
#102 2.0 #12 3.2 #14 5.2 #16 8.0 #18 13.0 #20 20.0 #22 32.6
LOAD IMPEDANCE
these frequencies, individually shielded twisted pairs are required.
3. Signaling line circuits for intelligent detectors should not be run outside of buildings. If this cannot be avoided, the precautionary measures detailed in the Electromagnetic Compatibi lity - Transient Protection Measures Section (Refer to Appendix 3-C) must be fol lowed.
o Audio Circuits 1. Audio circuits should not be run in the same conduit as
initiating circuits, unless approved by the equipment manufacturer in writing .
2. Unless specifical ly accepted by the equipment manufacturer, all audio circuits must be individually twisted pairs .
3. If multiple speaker zones are run in a common riser or cable tray, individually shielded twisted pairs should be used (with the shields terminated per the equipment manufacturer's recommendations) .
4 . Guidelines for audio circuit installation are listed in Table 3-6.
Table 3-6 - Wiring Guidelines for Speaker Circu its 25 VOLT LINES
MAX MAX LENGTH OF WIRE' SAFE SAFE (12% MAXIMUM POWER LOSS)
CURRENT POWER (A) (W) 10W 25W 50W 100W 50 1250 4550 1820 910 455
, 35 875 2850 1140 570 285 25 625 1810 725 362 181 20 500 1137 455 227 113 15 375 700 280 140 70 6 150 450 180 90 45 3 75 287 115 57 28 1 25 175 70 35 17 .5 12.5 112 45 22 11
(OHMS) 61 .5 24.4 12.2 6.1
3-73
200W 227 142 90 56 35 22 14 8.7 5.6 NIA
70.7 VOLT LINES
RESISTANCE MAX MAX LENGTH OF WIRF PER 1000FT SAFE SAFE 2% MAXIMUM POWER LOSS) WIRE PAIR CURRENT POWER
AWG
¥a ~ ~ 10W 25W 50W 100W
36480 14560 7280 3640 1.28 35 2450 22800 9120 4560 2280
#10' 2.0 25 1750 14500 5800 2900 1450 #12 3.2 20 1400 9100 3640 1820 910 #14 5.2 15
~ ~ ~ 1120 ~ #16 8.0 6 720
#18 13.0 3 210 2300 920 460 230 #20 20.0 1 70 1400 560 280 140
&to 32.6 .5 35 900 360 180 90 1 ~ ..!2.
NoteT I Nole 2: Note 3: Care should be taken to keep speaker circuit wire runs as short as possible. Care should be taken to size
wire, device loading, amplifier output and wire distances accordingly.
o Physical Protection 1. Cables shall be adequately supported and terminated in
approved fittings . 2. Cables shall be installed in such a way that maximum
protection against physical injury is guaranteed by building construction or alternatively run in condu its .
3. All wire and cable shall be adequately protected against fire and physical damage.
4. If not run in conduit, all wire and cable used in detection, alarm and emergency voice communication systems shall be Teflon coated or mineral insulated cable and comply with the flame resistance requirements for plenum cable as specified by recognized standards.
5. If Teflon coated or mineral insulated cable meeting the requ ired flame resistance rating is not ava ilable, wire and cable listed for use by a nationally recognized agency (UL, FM, FOC VdS, etc.) for fire detection and alarm system application may be used, provided it is installed in metallic conduit. PVC or other approved conduits or ducts may be used if allowed by local codes and with the prior written authorization by Starwood.
6. All vertically run wire and cable , not in conduit, shall be protected by 2-hour fire rated construction (i.e., in a 2-hour fire rated shaft/pipe chase).
7. The primary and secondary (return) legs of NFPA Style 6 (Class A) signaling line circuits shall not be run in the same cable, conduit or raceway. The primary and secondary legs should be separated by a minimum construction having a fire resistance rat ing of 2 hours.
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200W
-m% 725 455 280 180 115 70 45
24.5
8. The emergency voice communication system shall be designed and installed such that attack by fire in a pag ing zone causing loss of communication to this paging zone shall not impact any other pag ing zone. In addition, the system shall be designed and installed such that attack by fire causing failure of equipment or a fault on one or more installation wiring conductors of one communication path shall not result in total loss of communication to any paging zone. • Exception NO. 1: The fire command station and the
central control equipment. • Exception NO. 2: Where there is a separate means
acceptable to the AHJ for voice communication to each floor or paging zone.
• Exception NO. 3: Where the installation wiring is enclosed in a 2-hour fire rated enclosure, other than a stairwell.
• Exception No. 4: Where the installation wiring is enclosed within a 2-hour fire rated stairwell that is fully sprinklered in accordance with the latest edition of NFPA 13.
• Exception NO.5: When a paging zone is directly attacked by fire within the zone.
o Installation Hints 1. Although fully enclosed, metallic conduit is
recommended, both open and closed ducts are permissible if acceptable to local authorities. PVC ducts may be used for feed ing cables through floors in nonextreme conditions (some codes, e.g., USA, call for metal conduit only, check with local authorities).
2. Cable feeder boxes are used for feeding cable and wire through long lengths of conduit.
3. Crossover boxes permit the crossover of power lines, telephone or other circuits by leads of the fire detection system.
4. Terminal boxes or other connections must be approved by the project planner.
5. Wiring may be fed through under floor and parapet ducts, ridges, dividing walls or conduits if: • It is kept apart from telephone lines, etc. • No leads carrying external voltages are included
(main power to the fire detection system is considered external) .
6. Conduit Sizing - To find the conduit size required for cables of common type and combinations of different size cables, follow the steps below (SI units in parenthesis ): • Square the outside diameter (from the
manufacturer's catalog) of each cable and total the results .
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• Multiply the total by 0.7854 (5.07 cm) . This is the total area of the cables in square inches (square cm).
• Using Table 3-7, select conduit size with area equal to or greater than the total area.
• For three or more cables within a single conduit, the maximum permissible area to be occupied by the cables is 40% (NFPA 70), (although a single cable is permitted to occupy 53% and two cables are limited to 31 % conduit fill, 40% conduit fi ll is often used as a guide). For a single cable, use 0.5927 (3 .82) in step (b); for two cables, use 1.1034 (7.12), and for three or more cables, use 0.7854 (5.07).
Table 3-7 -
Conduit Size Permissible Area
Yo in. (1 .27 cm) 0.12 in' (0 .77 cm')
y. in. (1 .91 cm) 0.21 in' (1 .35 cm')
1 in. (2.54 cm) 0.34 in' (2.19 cm')
1Y. in. (3.18 cm) 0.60 in' (3 .87 cm')
1 Yo in. (3.81 cm) 0.82 in' (5.29 cm')
2 in. (5.08 cm) 1.34 in' (8.65 cm')
2Y. in . (5.72 cm) 1.92 in' (12.4 cm')
3 in. (7 .62 cm) 2.95 in' (19.0 cm')
3Yo in. (8.89 cm) 3.96 in' (25.5 cm')
4 in. (10.16 cm 5.09 in' (32.8 cm' )
4Yo in. (11.43 cm) 6.38 in' (41.2 cm')
o Intermediate Distributors (Terminal Cabinets) 1. Although not recommended, large installations
sometimes require intermediate terminal cabinets to connect wiring from detector zones, alarm devices, or small control units to multicore cables (such as the main cable). If used, care should be taken to maintain the required Class A wiring (Style 6 or 7) for each circuit. In addition, manufacturer's recommendations, local and national codes and standards must be followed.
2. Intermediate distributors should be sited based on economic considerations and located where they can form a center for various signal wires such as floors or wings. They should be installed in dry rooms with easy access for servicing (such as electrical equipment rooms). The recommended mounting height is 4.5 ft (1 .5 m) on center, with the lower edge no less than 1 ft (0.3 m) and the upper edge no more than 9 ft (2 .7 m) from the floor. Intermediate distributors must be labeled as "Fire Alarm Circuit". Doors or cover plates must be fitted with locks or screws.
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3. Terminations must be in accordance with the project planner's instructions. No more than two pairs of wires may be connected in parallel and properly anchored.
3.5.5 Installation and Connection of Equipment
(a) Installation of Special Devices • Detectors Mounted on Suspended Ceilings
o Detectors should be mounted as shown in Figure 3-39.
CONCRETE
• I
STEEL
•
I
SUSPENDED CEILING
Figure 3-39 - Mounting Detectors on Suspended Ceilings
o It is important that the steel condu it rod between the detector and the junction box is strong enough to stabilize the detector for future maintenance work. Therefore, it should allow removal of a detector without damaging the ceiling elements.
• Installation of Manual Alarm Stations o As required in the United States, manual alarm stations should
be installed approximately 44 in. (111 .8 cm) above the floor, so they are accessible by persons with disabilities. Other countries may permit up to 60 in. (152.4 cm), however 44 in. (111 .8 cm) is recommended.
o Should be visible and accessible to persons entering the room (do not locate behind door).
(b) Connections • Identification of Wires
o All cable sheathing must be continued through the entry sockets into the equipment. The same color wire must be used throughout a zone circuit.
o When it is not possible to maintain the color code, the ends of cables must be marked by colored insulation tubing.
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o All wire and cable must be identified with metallic or phenolic labels indicating their circuit.
• Check of Installation Wiring - Before connecting the installation wiring to the terminals provided on the control panel, check the wiring for extraneous voltages, short, open, and ground circuits .
(c) Precautions with High-Voltage Equipment • The sharing of cables between fire detection systems and other
installations is not permitted. Separate cables must always be used and separation must be maintained in shared raceways (not permitted in shared conduit).
• All wiring of the fire detection system must be installed to prevent flashovers from high-voltage cables or systems. In high-voltage rooms, all detectors must be safely accessible. Only detector exchangers with insulated rods are allowed in these areas.
• Wiring and equipment may not be mounted above any live installations (in case metal parts, such as detectors or tools, fall). Only non-conductive conduits such as PVC may be used in such instances.
• Installations in high-voltage areas require special permission, which should be obtained by the customer and should only be entered after special permission has been obtained . Ladders may only be used if all high-voltage gear has been switched off and is grounded in accordance with the relevant operation codes.
• Protective Distances o One centimeter per 1000 volts must be used, with a minimum
distance of 2.5 in. (6.4 cm). o All equipment must be installed outside the safety barriers in
high-voltage areas, wherever possible in the open gangways. o Leads and cables of the fire detection system should not be run
in parallel to any high-voltage or high-current lines.
3.5.6 Accessibility
The accessibility of all system components is vital for inspection, testing, and maintenance.
(a) Detectors • Must be easily accessible at all times. • A clearance of at least 20 in. (50.8 cm) on all sides is required to
allow for maintenance work. • It must be possible to test and remove the detector from
immediately below its installation position.
(b) Response Indicators • Built-in Response Indicators
o Detectors with built-in response indicators are recommended for hotels.
o All detectors must be installed to keep the response indicators visible to the investigation squad.
• External Response Indicators
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o Recommended for areas that are temporarily inaccessible (guestroom) and for detectors that are not of the individually identifiable, system connected type.
o Installation of the external indicator right above the door leading to the detector is recommended.
o External indicators are not required for intell igent reporting detection systems.
3.5.7 Control Equipment
(a) All control units shall be installed in accordance with engineering specifications, manufacturer's recommendations and local/national codes and regulations.
(b) Control units and associated operating devices (i.e., terminals, printers and displays) shall be installed in accessible locations.
(c) Environmental conditions, such as temperature, humidity and dirt accumulation, must be considered.
(d) It is the responsibility of the fire protection engineer, together with the manufacturer and the hotel safety engineer, to determine a suitable location for each control panel. The locations for such devices shall be indicated on all contract drawings.
(e) The cables and wire entries into the control panels shall be equipped with strain relief to prevent disconnection of the terminations due to work performed in another part of the system. All cables into and out of the control panel shall be suitably marked and indicated as part of the fire alarm system.
(I) Each control panel shall have a separate circuit breaker in the electrical distribution cabinet specifically marked 'FIRE ALARM SYSTEM'.
(g) The central control equipment shall be located in fire-resistive areas and shall have a minimum of a 3 ft (0.9 m) clearance around the face of the fire command station and central control equipment.
(h) Should the fire command station, used for control and selection of the emergency voice communication circuits, be remote from the central control equipment monitoring the detection devices, the wiring between the two shall be installed in conduit between the two control panels. The maximum amount of conduit should not exceed 100 ft (30.5 m) or must be enclosed in a 2-hour fire rated enclosure.
3.6 Commissioning and Acceptance Test
3.6.1 Commissioning
(a) Before connecting the installation wiring to the terminals provided on the control panel, check the wiring for extraneous voltages, short, open, and ground circuits.
(b) Technical Aspects of Commissioning o Ensure that system complies with guidelines and maximum ratings. o Program the control unit with user data. o Carry out a comprehensive performance check of the fire detection,
alarm and voice communication system, including control functions as required by the acceptance testing procedures.
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• Give system a trial run for one month making modifications to operating features to ensure "nu isance alarm free" operation.
(c) Training Aspects of Commissioning • The person responsible for the system must be instructed and
understand the following: 1. Explanation of the extent of monitoring, the types of detectors
used, the form of alarm and fire control installations. 2. Operation of the fire detection, alarm and voice communication
system. 3. Procedure to follow in case of trouble. 4. Servicing checks, carried out periodically by the system
operator. 5. Record all events in a log book. 6. Note addresses and telephone numbers of the maintenance
service which can be called any time. (d) System Documentation - After commissioning work has been
completed, the installer must provide two complete sets of up-to-date technical documentation (as-built drawings, manufacturer's manuals, operating instructions, log book).
(e) System Identification - A permanently mounted placard should be located near the protective signaling system. It should contain the following information: • Names, addresses, and telephone numbers of the installation and
servicing contractors. • Reference to the NFPA or other standards, including its date of
issue to wh ich the system conforms. • Description of the primary (main) and the secondary (standby)
power supplies, which should include the following information : 1. Physical location and identification of allover current devices
and switches which control the primary and secondary power supplies
2. Type of secondary supply 3. Standby battery specification, including ampere hour capacity,
voltage per cell, number of cells, and the battery type 4. If a standby generator is used, include the type and quantity of
the stored fuel and transfer time 5. Names of the authorities having jurisdiction, including their
inspection references and dates 6. Location of the as-built drawings and the system operating and
maintenance instructions
3.6.2 Acceptance Tests
Are complete operational tests, conducted on the entire installation for the purpose of verification of compliance with the applicable standards and with the tender of the solicited system.
(a) Every initiating device must be tested to ensure operation, proper annunciation and control of output functions. All indicating circuits and devices must be tested for audibility (and visibility where applicable) and proper transmission of signals.
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(b) The following are general guidelines for testing procedures. Further details can be found in NFPA 72.
(c) Scope of Testing • Installation Wiring - Check whether measurements on each circuit
have been made after installation or during commissioning for: o Stray voltage o Ground faults o Short circuits o Loop resistance
• System Testing o Visually inspect system for mechanical integrity. o Verify that the system is in normal supervisory cond ition . o Test each initiating device circuit, indicating appliance circuit and
signaling line circu it to confirm that the integrity of installation conductors is being properly monitored . One connection on each circuit should be opened and the proper response at the control unit verified .
o Test each initiating device and indicating appliance for alarm operation and proper response at the control panel.
o Test the system for all intended functions in accordance with the manufacturer's manual.
o Test all supplementary functions for proper response. o Test all primary (main) and secondary (standby) power supplies.
• Additional Tests on Multiplex Systems - The following procedures describe additional acceptance test methods to verify multiplex-type protective signaling system performance. The manufacturer's manual and the as-built drawings should be used to verify proper operation after the initial testing phase has been performed. o Starting from the unpowered cond ition, initialize the system per
the manufacturer's manual. Tests should be conducted to verify that communication exists between the central processing unit and the connected peripheral devices.
o Each initiating device circuit and signaling line circu it (intelligent report ing systems) should be tested for its alarm reporting capability by operating at least one of the connected in itiating devices. Upon completion of th is test, an open circuit trouble cond ition should be made to verify open circuit fault detection. Add itional tests should be conducted to verify all possible status modes that the initiating device circuit should provide.
o Verify that each test signal is properly received and processed by the Fire Command Center equipment (main fire alarm control panel).
o Conduct tests from the multiplex interface to verify trouble indications for common mode failures, such as AC power failure . To test for the AC power, remove the AC power supply to the satell ite control unit and activate at least one initiating device. Consult the manufacturer's manual for other common mode failures and conduct the described testing procedures. Verify proper receipt and processing at the Fire Command Center.
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o Test each communication circuit between RLCP and the Fire Command Center main fire alarm control panel to confirm that the integrity of installation conductors is properly monitored.
o Each of the fault conditions that the system is required to detect should be introduced on the signaling line circuit. Verify the proper receipt and the proper processing of the signal at the Fire Command Center.
o When multiplex protective signaling systems are equipped with various optional features unique to these systems, the manufacturer's manual should be consulted to determine the proper testing procedures for verifying the proper operation of the optional features. This is intended to address such items as verifying controls performed by individually addressed or grouped devices, sensitivity monitoring, pre-alarm or verification functionality and similar.
• Testing of Smoke Management Systems o The lack of agreement on a single method for testing smoke
management systems has often caused delays at the time of acceptance testing.
o It is strongly recommended that the fire protection engineer work closely with the hotel's owner (and manager) and the local authority to develop a clear testing procedure, which meets the objectives of all parties concerned.
o NFPA 92A, Recommended Practices for Smoke Control Systems, provides recommended test methods and equipment that can be utilized.
3.6.3 Certificate of Compliance
(a) A certificate of compliance shall be prepared for each system. An example is provided in the latest edition of NFPA 72.
(b) A copy of the certificate shall be given to the system owner and AHJ after the completion of the operational acceptance tests.
3.7 Operation and Maintenance
3.7. 1 Responsibility
(a) A safety/security person and/or hotel chief engineer should be responsible for all active fire protection measures, systems and emergency planning. This person should be employed by the hotel and should report directly to the general manager.
(b) In smaller facilities, the hotel manager must carry the responsibility himself, probably delegating technical tasks to the hotel's engineer.
(c) In many areas, the responsibility is regulated by regional or local codes; contacting the local fire department for advice is recommended .
3.7.2 General Tasks
(a) Table 3-8 provides a generalized list of operation and maintenance tasks for various fire protection systems.
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Table 3-8 - Overview of General Operation and Maintenance Tasks
Task Recommended T ime
Period
A fire evacuation drill is to be conducted for all employees and hotel Annually
guests urged to participate.
All emergency procedures are to be reviewed, tested for their effectiveness, updated and coordinated with the Fire Department (i.e., Annually evacuation drills, bomb threats, earthquake, etc.).
New employees must be made familiar with the building and the emergency measures, as well as their personal responsibility in case of Start of employment and fire and evacuation. Fire and Emergency Procedure training to be every 6 months thereafter conducted for all new employees.
Emergency instructions and exit egress signage in guestrooms must be Every 4 months
verified .
Fire and Emergency Procedure Training is to be conducted for Telephone Quarterly Operators and Night Managers.
Employees must be advised about any changes in plann ing, building Quarterly or as required construction, escape routes, fire loads, procedures, equipment, etc.
Fire drills are to be conducted; the time of drill should be varied so that all shifts participate during the year. (Hotel guests do not have to Monthly participate.)
All areas of the building must be inspected to detect any changes in fire load, accumulation of trash or dirt (particular attention to the kitchen area
Monthly for accumulation of combustible materials such as oil and grease and laundry areas for lint build-up).
All dedicated electric service closets, switchgear rooms, transformer vaults/closets, etc., are to be inspected to verify they are not being used Monthly for storage of any material, combustible or otherwise.
The proper storage of grease and oil rags (i.e., approved containers) is to Monthly
be verified .
The safe laundering of rubber-backed bath mats, grease rags, etc., is to Monthly be verified .
Manual fire fighting equipment (i.e., hose reels and fire extinguishers) must be inspected for their availability and accessibility. Monthly (Missing/defective items must be replaced immediately.)
Escape route identification must be checked, and missing signs must be 2 to 6 weeks replaced , any obstructions must be removed.
The fire emergency signage in the elevator foyers are to be verified . Weekly
Escape routes must be checked for obstructions and accessibility Weekly (especially locked or blocked doors).
The punctual emptying of waste baskets, trash cans and ashtrays is to be checked . Ensure all trash has been removed from noors at end of day Weekly shift.
The continuance of the building's fire compartmentation must be checked Weekly
(e.g ., doors held open or missing).
Where required, nameproofing certificates for fabric materials are to be As required andlor obtained and updated. after dry cleaning .
The availability of emergency instructions in guestrooms (room cards) Daily, with room make-up must be checked.
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Table 3-8 - Overview of General Operation and Maintenance Tasks
Task Recommended Time
Period
The proper designation of 'no smoking' regulations must be checked. Continuously
(b) The tasks discussed in this table may be expanded based on the particular hotel.
(c) Local and national regulations should be consulted to determine if there are more stringent requirements than those listed in the table .
3.7.3 System Maintenance
(a) Ideally, a service contract exists whereby the manufacturer, supplier or licensed contractor is responsible for periodic inspection and testing.
(b) The service contract should establish that an engineer is on call at all times and that telephone requests for emergency service are promptly met. Common contracts require that service will be made available within 4-6 hours on a 24-hour, 7 -days-a-week basis.
(c) If a service contract does not exist, a minimum of 2 hotel employees should be trained by the equipment manufacturer, supplier, installer or contractor, to allow emergency servicing (replacement of fuses, detectors, etc.). Therefore the hotel must carry a supply of spare parts .
(d) Tab/e 3-9 provides a recommended maintenance schedule for various fire protection systems. All equipment must be tested and maintained per the manufacturer's recommendations and in compliance with local/national codes.
Table 3-9 - Recommended Maintenance Schedule and Requ irements
Equipment Maintenance Schedule
Operate entire fire alarm system including all initiating and alarm Emergency Standby Battery indicating devices (bells, horns, etc., for five (5) minutes on standby) Test emergency power. Where emergency voice communication system is
used, operate on standby battery power for five (5) minutes.
Electric Fire Pump Test monthly
• Test weekly (minimum 30 minutes run time). Note: Generator and fire pump must be started and/or observed running by operating
Diesel Fire Pump personnel. Open test valve to simulate water flow conditions when start testing fire pump.
• Annually - Conduct flow test
Emergency Generator/Fire Weekly - Check voltage and output of battery charger. Perform battery Pump Battery cell hydrometer float test
• Weekly - Visually inspect sealed valves. • Monthly - Visually inspect locked valves, valves with tamper
Fire Standpipe System switches and post indicator valves. • Annually - Test post indicator valves. Perform standard
maintenance procedure on all valves.
• Monthly - Visually inspect hydrants. Fire Hydrants (Private) • Semi-annually - Perform maintenance procedure.
• Annually - Open and close hydrants. Fire Department Monthlv - Visuallv inspect pump test header. roof manifolds and
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Table 3-9 - Recommended Maintenance Schedule and Requirem ents
Equipment Maintenance Schedule Connections Siamese connections.
0 Monthly - Perform visual inspection.
Fire Hoses/Nozzles 0 Annually - Re-rack fire hoses/nozzles.
Every 5 years - Professionally test hoses per applicable standards 0
(e.g., NFPA, VdS, FOC, etc.) and manufacture~s recommendations.
0 Quarterly - Test water now alarm devices (audible or visual signals) by opening main drain. Flow test main drain(s) (blowdown).Visually
Fire Sprinkler System inspect sprinkler heads, sprinkler piping (readily accessible) and hangers for corrosion and damage.
0 Test antifreeze specific gravity (if applicable). 0 Every 5 years - Verify calibration of pressure gauges.
0 Daily - In cold weather, inspect heating mechanism (if applicable). Fire Sprinkler System 0 Monthly - Visually inspect water level. Gravity Tanks 0 Semi-Annually - Test tank level indicator.
0 Every 2 years - Visually inspect condition of tank.
0 Daily -In cold weather, inspect heating mechanism (if applicable).
Fire Sprinkler System 0 Monthly - Inspect water level and pressure . 0 Semi-annually - Test tanks. Pressure Tanks
Every 2 Years - Visually inspect condition of tank. Test high and low 0
air pressure switches. 0 Daily - In cold weather, inspect heating mechanism (if applicable). 0 Weekly - Inspect air and water pressure. 0 Quarterly - Inspect priming water supply.
Dry/Pre-actioniDeluge 0 Semi-Annually - Test quick opening devices (AKA accelerator or Systems quick opening device).Test deluge detection device.
0 Annually (in Fall) - Flow test low point drains (blowdown). 0 Annually (in Spring) - Trip-test dry pipe test dry pipe valves. 0 Every 3 Years (in Spring) - Full flow trip test dry pipe valves.
0 Monthly - Verify proper zone annunciation, ensure each zone can be reset and the entire system is free of all trouble conditions. Verify the proper operation of LED's and lamps. Send alarm signal to central monitoring company or fire department.
Fire Alarm Detection 0 Every 2 Months - Test pre-alarm voice/tone devices (voice tested if System P.A . is provided).
0 Semi-Annually - Test general alarm voice/tone devices (operate as during full property evacuation).
0 Annually - Test battery backup (operate entire voiceltone system for 5 minutes on standby emergency power).
0 Monthly test 1/12 of the total devices 0 Annually test all devices as follows :
1 . Pull stations tested by pulling handle. 2. Single station smoke detectors tested by operating test button or
Fire Alarm Detection magnet (or test set). 3. System connected smoke detectors tested in place by smoke or System Devices
other manufacturer accepted aerosol. 4. Heat detectors tested by heat source equipment. (If non-
restorable, fixed temperature heat detector device, test a sample and then replace.)
5. Water flow switch tested by operating inspector test valves.
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Table 3-9 - Recommended Maintenance Schedule and Requ irements
Equ ipment Maintenance Schedule
6. Valve supervisory (tamper) switches tested by turning valve Y. turn.
7. Fire fighter's telephones tested by communicating through the system.
8. Flame detectors test in accordance with manufacture~s instructions.
All connections made to other equipment, such as fire pumps, Other Equipment Monitored emergency generators, etc. , which provide a supervisory signal by the Fire Detection & indicating operation of said device should be tested for signal Alarm System transmission at the time of the individual equipment test, but no less then
once per year.
Multiplex Communication • Annually - Where primary and secondary (return) communications paths are provided (NFPA Style 6, Class A), remove primary path, Wiring Between Control verify receipt of trouble condition at control panel and verify Units (Style 6, Class A) operation of system on secondary communication path.
• Weekly - Test for a minimum 30 minutes run time. Emergency Generator • Annually - Test automatic transfer switches by simulated power
failure. Perform full load test.
• Monthly - Take inventory and perform visual inspection (sign and date each extinguisher tag).
Fire Extinguishers • Annually (or more frequently if required by code) - Have extinguishers professionally serviced.
• Every 12 years (or more frequently if required by code) - Perform discharge and hydrostatic tests.
Kitchen Exhaust Hood Fire • Monthly - Visually inspect. Every 6 months (or more frequently if required by code) - Have Extinguisher System • system professionally inspected/tested/maintained.
Kitchen Exhaust Hood Weekly (or more frequently if required) - Clean/degrease.
Filters
Continuous Service Kitchen Every 2 months (or more frequently if required) - Chemically Exhaust Hood Duct System cleanlfireproof.
Infrequently Used Kitchen Annually (or more frequently if required) - Chemically clean/fireproof. Note: Ensure there are adequate access panels to facilitate c/ean-out of
Exhaust Hood Duct System the entire kitchen exhaust hood duct system.
Emergency Lighting Every 6 months (areas where emergency power is not available or (Battery Operated) required by code) - Operate for 90 seconds.
Escape Routes/Exit Signs Monthly - Visually inspect entire building.
Door Release: • Verify door closes when associated detector is tested - test with • Single-Dedicated detector schedule.
Smoke Detector • Monthly - Verify door closes when the fire alarm system is in the Actuated alarm state.
• Any Alarm Activation • Annually - Test each device. Verify door closure when detector is • Combination door activated.
closer/smoke detector • Annually - If possible, remove link and verify door closure. activated
• Fusible Link (Fire Door)
Fire Exit Doors Monthly - Visually check operation.
Laundry Dryer Exhaust Every 6 months (or more frequently if required) - Inspect and clean. Ducts
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Table 3-9 - Recommended Maintenance Schedule and Requ irements
Equipment Maintenance Schedule
Laundry Room Exhaust Every 6 months (or more frequently if required) - Inspect and clean. Note: Ensure there are adequate access panels to facilitate clean-out of
System Ducts the entire dryer exhaust system and room exhaust system.
Laundry Dryer lint Screens/lint Collection Daily - Clean equipment. Devices
Trash & linen Chute Doors Monthly - Check for proper operation.
Fire Cart/Fire SuitcaselBack Monthly - Inventory. Pack
Main Gas Valve(s) Annually - Check for proper operation by gas utility company.
Elevator Pits Monthly - Cleaned by elevator service company (not to be done by in-house employees).
• Annually (or more frequently if required by code) - Perform Elevators professional safety inspection
• Annually - Test elevator recall function
Boiler and Pressure Vessels Annually (or more frequently if required by code) - Perform professional safety inspection
3.7.4 Protection of Instal/ed System Components
(a) Care should be taken to ensure all installed systems are protected against abuse.
(b) Recommendations for the protection of system components are provided in Table 3-10.
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Table 3-10 - Recommendations for the Protection of Installed System Components
Activity Proper Measure
• Paint spraying of walls and ceilings Cover detector and base with plastic bag or remove
• Sanding of plastered walls and wood detector and cover up detector base • Carpet cleaning (dry cleaning) Washing and cleaning of walls and Do not apply any cleaning solvents to detectors, remove ceilings or cover up detector Painting of walls and ceilings Do not paint over detector; remove or cover up detector Testing of detectors with test gas Use manufacturer-approved compounds (aerosols) only
Manual stations in exposed locations Protect them with guard rails from being hit by food carts, vehicles, etc.
(c) If detector housing needs to be painted for aesthetic reasons , consult detector manufacturer.
3.7.5 Documentation
(a) Operation and maintenance instructions should be provided by the manufacturer, supplier, installer or contractor. These instructions should outline rout ine procedures and specify test intervals.
(b) Detailed maintenance and test procedures should be prepared using provided documentation .
(c) Logbook • The safety/security engineer or other designated employee must be
responsible for keeping record of all fire protection measures. • The logbook should include information such as:
o Changes in emergency plan/procedures o Fire or evacuation drills o Training sessions o Inspection of escape routes and emergency instruction
measures o Inspection/testing/maintenance of manual fire extinguishers o Testing of sprinkler, hose reel , fire detection, EVAC, and
emergency telephone systems • The logbooks should also contain record of all fire and system
related events (with time and date), including: o Fire, nuisance and supervisory alarms o Trouble conditions o Malfunctions o Tests and drills o Replacement actions (batteries, detectors, etc.)
(d) InspectioniTesting/Maintenance Certificates • The hotel management must request certificates for all inspection ,
testing , servicing , maintenance, repair or replacement of fire safety equipment performed by a manufacturer, supplier or contractor
• Generally, such certificates should be kept on fire for at least 10 years, local/national codes should be consulted for additional requirements .
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3.8 Summary of Technical Requirements
3.8.1 General
• Upon activation of elevator lobby or machine room smoke detector, all elevators shall return to the main level of guest exiting or other area approved by the local AHJ.
• All equipment shall be UL listed for use in the United States. For other countries, systems shall have proper approval from the public agency responsible for that particular area. For countries where no special codes exist, it is recommended to select systems that have been approved by at least two of the agencies listed below:
1. Underwriter's Laboratories (UL) - USA 2. Factory Mutual (FM) -USA 3. Verband der Sachversicherer (VdS) - Germany 4. Association Francaise de Normalisation (AFNOR) - France 5. British Standards (BS) - Great Britain 6. Fire Offices Committee - Great Britain 7. Canadian Standards Association - Canada 8. Underwriter's Laboratories Canada (ULC) - Canada 9. Australian Standards (SAA) - Australia
• A fire fighter's telephone system shall be provided in at least one stairwell at each level (preferable the stairwell with roof access) .
• A 16-hour training program shall be conducted for selected members of the hotel staff by the alarm installer. Training documents shall be available to the hotel staff.
• A complete, written description of the hotel fire alarm system, components, circuits, operating sequence, and maintenance requirements shall be established and shall be made available to the entire hotel staff.
3.8.2 Smoke Detectors
• System connected smoke detectors should be installed in all guestrooms, public spaces and back-of-the-house areas, except areas not recommended for smoke detector installation (i.e., kitchens, areas exposed to dirty environments). D Sensitivity shall range between 2.5% and 4.0% obscuration. D All smoke detectors installed in public meeting rooms shall be
provided with a nuisance alarm reduction feature. D If complete area smoke detection is provided throughout the hotel ,
HVAC exhaust duct smoke detection is not required , unless required by other local code.
3.8.3 Guest Rooms
• Shall be provided with an audible alarm device. • Where emergency communications systems are installed, loudspeakers
shall be installed. • Guest rooms for persons with disabilities, shall be provided with system
activated strobe lights in addition to audible devices.
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• System connected smoke detectors shall not activate the hotel evacuation alarm, however an internal (supervisory) alarm shall be initiated to alert hotel staff. Individual guestroom audible devices and visual devices (if provided) shall also activate upon initiation of smoke detector.
3.8.4 Manual Pull Stations
• Shall be installed throughout the hotel, next to all exits and at other strategic locations.
• Double action type pull stations are recommended. • The maximum distance between pull stations shall not exceed 150 It
(46 m). • These devices shall be mounted 44 in. (111 .8 cm) above the floor to the
centerline of the device.
3.8.5 Wiring
• All fire detection, alarm and emergency communication systems shall be wired Class A and must be supervised.
• The feed and return wiring risers must be in separate conduit remote from each other. Wiring is to be of copper conductors or optical fibers .
• If an intelligent or multiplex system is installed wiring must be twisted pair (and shielded if recommended by the manufacturer or if electrical interference is anticipated).
3.8.6 Emergency Voice Alarm Communication (EVAC) Systems
• A complete EVAC system shall be provided for all new and retrofit renovations.
• The main fire detection and emergency voice alarm communication control panels shall be located in the Fire Command Center (FCC).
• The emergency voice alarm communication system shall be provided with a minimum 24-hour standby with 15-minute full system operation battery back-up. If the EVAC system is supplied by an emergency generator, the standby requirement can be reduced to 4-hour standby with 15-minute full system operation.
3.8.7 Fire Alarm Control Panel
• The main fire alarm control panel shall annunciate by floor and type of device.
• The main fire alarm control panel shall be mounted in a 24-hour supervised, secure, fire-safe location. This area must be provided with emergency lighting.
• The fire alarm control panel must have Alarm and Trouble indication by zone (by device, if intelligent type system).
• Water flow switches and valve supervisory devices shall be connected to the main fire alarm panel. The activation of water flow switches shall have the same alarm priority as manual pull stations.
• All fire alarm system control panels in the FCC shall be provided with a minimum of either 24-hour battery backup (full system operation) or 4-
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hour battery backup (full system operation) when connected to the hotel's emergency generator.
• All fire alarm control panels, remote annunciators, and the emergency communication control panels shall be designed with a minimum of 20% spare capacity for expansion.
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Appendix 3-A - Nuisance Alarm Problem
(a) Nuisance alarms are often caused by: • Mischievous use of the system (blowing smoke at a detector,
pulling alarm stations, etc.) • Maintenance work in monitored area (welding, painting, etc.) • Deceptive phenomena (insects, dust, steam, sunlight, etc.) • Corrosion of contacts (due to environment) • Electromagnetic influence and radio frequency influence (walkie
talkies, cellular phones, etc.) • Detectors which are of the wrong type, improperly
placed/installed, dirty, etc. (b) Methods to Reduce Nuisance Alarms
• False alarms due to maintenance work can be avoided by proper organization, training and supervision.
• Due to microprocessor technologies, some fire detection equipment manufacturers have been able to incorporate nuisance reduction features into their equipment.
• Cross Zoning a Based on the concept that two separate zones must respond
before a general fire alarm signal is activated. a Response of a sing le zone leads to pre-alarm condition, which
is announced to in-house staff. a Recommended for areas in the hotel where there may be
heavy smoking. a Always used when detectors are used to activate extinguishing
systems. o Can be performed with either traditional zoning/devices or
intelligent devices. a For traditional zoning methods, detectors must be wired to
guarantee proper two-zone response in case of fire. a For intelligent detection systems, cross zoning may be
accomplished by careful formation of groups in the software. • Pre-Signal (Alarm Sequencing) Concept
a Method of alarm verification used to help reduce the chance of panic in crowded areas (retail areas, ballrooms, etc) .
a First response from a detector is -silently' announced to key personnel, who have been assigned the task of investigating the alarm.
o If a second detector responds, a general fire alarm is given . o A general alarm is also initiated if either a manual pull station
or the sprinkler system water flow switch are activated. • Alarm Verification Concept
a Applicable in areas where puffs of smoke or gas are common in the environment.
a When the detector first responds, an automatic reset command is issued and the alarm is suppressed.
a When the detector responds a second time (within a particular time period), an alarm is immediately issued .
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o The time limit varies based on the manufacturer, however usually limited by local or national codes. NFPA 72 limits the time delay to 60 seconds.
o This concept is not applicable for heat detectors, manual alarm stations or water flow switches. An alarm from any of these devices cause a general alarm signal without delay.
• Positive Alarm Sequencing o Utilizes a dual timing principle for delaying a general alarm. o Similar in concept to cross-zoning, however requires only a
single device in alarm. o This method can only be used when a system operator is
present at all times. o The operating sequence requires two levels of device priority
and two system timers (T1 and T2) . 1. Priority 1 - Immediate general alarmlfire department
notification (manual alarm station, water now device) 2. Priority 2 - Delayable alarm (smoke detector)
o When there is a response by a priority '2' detector, delay T1 is started. When T1 time runs out without a response by an operator, the fire department is called and a general alarm signal is activated. If the alarm is acknowledged while T1 is running, the system interprets this as a sign that an operator is present. In this case, timer T2 is started, allowing time for investigation.
o Time periods T1 and T2 are often regulated by local or national codes. (NFPA 72 limits T1 to 15 seconds and T2 to 180 seconds.)
o If the investigation verifies the existence of a fire or if time T2 runs out, the fire department can be summoned by initiating any manual alarm station.
o However, if the investigation determines that only a minor fire exists that can be extinguished easily, or that it is not an actual alarm, the fire alarm control panel can be reset while T2 is still running without sounding a general alarm.
• Sensitivity Compensation o Detector feature which maintains a constant sensitivity over
time, compensating for component aging and dirt accumulation.
o Useful in areas of high dirt build-up or where detectors are difficult to access.
o This detector feature does not eliminate the need for regular detector maintenance.
o Helpful in reducing long-term maintenance costs by identifying which detectors need to be cleaned or replaced.
• Variable Sensitivity Settings o Similar in concept to sensitivity compensating detector.
Several systems have the ability to automatically or manually change between fixed sensitivity levels either at the detector or at the control panel.
o For intelligent detector systems, a detector may have two or more preset sensitivity levels. The control panel can be
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programmed to shift between the various sensitivities at specific time intervals. It is also possible to program different sensitivity levels based on the location of the devices.
o For analog reporting detector systems, the sensitivity adjustments are often made at the control panel. The sensitivity levels can be adjusted by device, groups of devices and by time of day.
o Sensitivity levels must remain in the range specified by the regulatory agencies such as UL or VdS.
o These systems are useful in facilities where various environmental conditions exist.
• Signals Indicative of Dirty Detectors o In many of the intelligent detector systems, a signal is provided
which indicates the need to clean the detector. o Waiting for a dirty detector signal should not be used as an
alternative to scheduled maintenance. • Electromagnetic Compatibility (EMC)
o Many control units contain built-in interference protection, intended to minimize the effects of electromagnetic interference, radio frequency interference (RFI), and electrical transients (induced voltage and current spikes).
o Level of protection is dependent on the requirements of various regulatory agencies.
o Additional protection may be required to reduce the occurrence of nuisance alarms resulting from these phenomenon.
o Refer to Append ix 3-9 for additional information on Electromagnetic Compatibility (EMC)
o Interference Factors which influence EMC include: 1. Lightning 2. High frequency or radio interference 3. Interference pulses 4. Electrical or magnetic interference fields 5. Transmission of electrical interference currents via
resistive coupling 6. Electrostatic Charging/Discharging
o Interference Protection Measures 1. All fire detection and alarm equipment must meet the
current revision of applicable standards, which require equipment to be designed with adequate EMI and RFI protection features.
2. However, some equipment may be exposed to abnormally high levels of interference.
3. Typically, the use of shielded cable or cable installed in properly grounded metallic conduit will negate a majority of the interference. In some cases, additional protection may be required.
4. Protection is available in the form of filters or other suppression devices, which can be installed on the detection devices, on the installation wiring or at the control
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panel. The manufacturer should be consulted when additional protective devices are to be installed .
5. The use of fiber optic cable instead of cable using metallic conductors provides for an alternate means of protection. Fiber optic cable are immune to EMI and RFI as they use light signals to transmit data instead of electronic signals.
o Additional Transient Protection Measures 1. All fire alarm equipment must meet the current revision of
applicable standards. By meeting these standards, the equipment is designed with adequate transient voltage protection for systems used within a single building.
2. For any circuits extended outside the bu ild ing, extra precautions must be taken to protect the equipment from damage caused by high voltage transients being induced on the circuits from nearby lightning strikes or other outside sources. These circu its should be run in metallic conduit that is properly bonded to a good earth ground , and external transient protection must be installed on each of those circuits .
3. The external transient protection required for each circuit depends on the characteristics of the circuit and, where lightning is a concern, the degree of lightning activity expected at the geographical location of the installation .
4. If it is apparent that there will be a high degree of lightning activity at the installation, it is recommended that additional transient protection be installed on equipment to prevent damage.
5. Additional transient protection is needed on multiplex communication network lines (signaling line circuits) and audio communications lines are routed underground from bu ilding to building in PVC conduit. Twisted shielded pairs with the shield earth grounded should be used with in the PVC conduit, or twisted pairs in metal conduit. Aud io circu its should be shielded independently from each other and from signal circuits .
6. When shielded cable is used, it is important that the equipment manufacturer be contacted for specific requirements regarding termination of the sh ield .
7. In all cases, it is extremely important that all ground connections be made to an 8 It (2 .5m) driven ground rod or equivalent water pipe connection.
8. The equipment manufacturer should be consulted when additional transient and interference protection is requ ired to ensure compatibility with the installed equipment.
9. If high voltage transients are anticipated in advance, the installation of fiber optic cable instead of cable using metall ic conductors is an option.
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Appendix 3-8 - Electromagnetic Compatibility (EMC)
Many control units contain built-in interference protection, intended to minimize the effects of electromagnetic interference, radio frequency interference (RFI), and electrical transients (induced voltage and current spikes).
• Level of protection is dependent on the requirements of various regulatory •
agencies. • Additional protection may be required to reduce the occurrence of nuisance
alarms resulting from these phenomenon. • Interference Factors which influence EMC include:
1. Lightning 2. High frequency or radio interference 3. Interference pulses 4. Electrical or magnetic interference fields 5. Transmission of electrical interference currents via resistive coupling 6. Electrostatic CharginglDischarging
• Interference Protection Measures 1. All fire detection and alarm equipment must meet the current revision of
applicable standards, which require equipment to be designed with adequate EMI and RFI protection features.
2. However, some equipment may be exposed to abnormally high levels of interference.
3. Typically, the use of shielded cable or cable installed in properly grounded metallic conduit will negate a majority of the interference. In some cases, additional protection may be required .
4. Protection is available in the form of filters or other suppression devices, which can be installed on the detection devices, on the installation wiring or at the control panel. The manufacturer should be consulted when additional protective devices are to be installed.
5. The use of fiber optic cable instead of cable using metallic conductors provides for an alternate means of protection. Fiber optic cable are immune to EMI and RFI as they use light signals to transmit data instead of electronic signals.
• Add itional Transient Protection Measures 1. All fire alarm equipment must meet the current revision of applicable
standards. By meeting these standards, the equipment is designed with adequate transient voltage protection for systems used within a single building.
2. For any circuits extended outside the building, extra precautions must be taken to protect the equipment from damage caused by high voltage transients being induced on the circuits from nearby lightning strikes or other outside sources. These circuits should be run in metallic conduit that is properly bonded to a good earth ground, and external transient protection must be installed on each of those circuits.
3. The external transient protection required for each circuit depends on the characteristics of the circuit and, where lightning is a concern, the degree of lightning activity expected at the geographical location of the installation.
4. If it is apparent that there will be a high degree of lightning activity at the installation, it is recommended that additional transient protection be installed on equipment to prevent damage.
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5. Additional transient protection is needed on multiplex communication network lines (signaling line circuits) and audio communications lines are routed underground from building to building in PVC conduit. Twisted shielded pairs with the shield earth grounded should be used within the PVC conduit, or twisted pairs in metal conduit. Audio circu its should be shielded independently from each other and from signal circuits.
6. When shielded cable is used, it is important that the equipment manufacturer be contacted for specific requ irements regard ing termination of the shield.
7. In all cases, it is extremely important that all ground connections be made to an 8 It (2.5m) driven ground rod or equivalent water pipe connection .
8. The equipment manufacturer should be consulted when additional transient and interference protection is required to ensure compatibil ity with the installed equipment.
9. If high voltage transients are anticipated in advance, the installation of fiber optic cable instead of cable using metallic conductors is an option.
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Appendix 3-C - Additional Information on Electromagnetic Compatibility
1. EMC is the ability of electrical or electronic equipment to function satisfactorily without influencing or being influenced by electromagnetic phenomenon in the surrounding atmosphere.
2. All electronic equipment (including fi re detection related devices) must be designed for EMC. The level of interference resistance of the equipment describes the maximum interference signal which may be tolerated before the distortion of the desired signal reaches a specific level. For fire detection equipment, this level is the alarm threshold.
3. To achieve EMC, it is necessary to acknowledge the presence of the following types of influence:
• Galvanic Influence - Created by the coupling of electrical circuits via a common impedance. The influencing factor is the current.
• Capacitive Influence - Created by the alternating electrical fields from a source of interference to a part of the system. The influencing factor is the voltage.
• Inductive Influence - Created by the magnetic alternating field of a source of interference as induced interference voltages in the receiver. The electrical cause is the charging current in the source of the interference.
• Wave Influence - Created by circuit or radiation waves which are coupled into parts of the system (RFI, for example). For radiation waves, the influencing factors are the electrical and magnetic field strengths. With circuit waves, the influencing factors are the line current and the line voltage.
4. Detection devices may suffer interference from waves, which spreads via detector lines and free space directly into the detector electronics.
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