safety design in highrise construction
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2011
SafetyDesigninHighRiseConstruction
JohnLee
April26,2011 280Broadway,6th
FloorTrainingRoom
build safe | live safe
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TheNYCDepartmentofBuildingsisaregisteredProviderwithThe
AmericanInstituteofArchitectsContinuingEducationSystems(AIA/
CES).Creditearnedoncompletionofthisprogramwillbereportedto
AIA/CESfor
AIA
members.
Certificates
of
Completion
for
both
membersandnonAIAmembersareavailableuponrequest.
Thisprogram
is
registered
with
the
AIA/CES
for
continuing
professionaleducation.Assuch,itdoesnotincludecontentthatmay
bedeemedorconstructedtobeanapprovalorendorsementbythe
AIAofanymaterialofconstructionoranymethodormannerofhandling,
using,
distributing,
or
dealing
in
any
material
or
product.
Questionsrelatedtospecificmaterials,methods,andserviceswillbe
addressedattheconclusionofthispresentation.
BestPractices
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CourseObjectives
Participantswillbeabletolearnfireprotectionrequirementsforhighrisebuildings Participantswillbeabletoassessspecialrequirementsforegressinhighrisebuildings Participantswillbeabletonavigatethecodewithrespecttospecialuseandoccupancies Participantswillunderstandrecentlyenactedlocallawsthataffectsafetyduringhighriseconstruction
ofhigh
rise
buildings
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TodaysAgenda
Participantswillbeabletounderstandthespecialfireprotectionsystemsrequiredforhighrisebuildings Participantswillbeabletoidentifytheegressprovisionsofthecodeforhighrisebuildings Participantswillbeabletoapplythestructuralintegrityprovisionsforhighrisebuildingsbasedupon
occupancyandseismicimportance
ParticipantswillbeableunderstandthechangestotheInternationalCodesforhighrisebuildingsandthe
relationship
between
the
New
York
City
code
and
theInternationalCode
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NewYorkCity
New
York
is
a
city
of
high
rise
buildings
Home
to
many
of
the
worlds
first
and
tallestbuildings
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InternationalCodeCouncil
NYChasadoptedtheInternationalCode
Councilbody
of
construction
codes
NYCisanactiveparticipantinthecodedevelopmentprocess
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HighRiseBuildings
SpecificallyaddressedinsectionBC403
Definedashavingoccupiedfloorslocated
morethan
75
feet
above
the
lowest
level
offiredepartmentvehicleaccess
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HighRiseBuildings
75
ft75ft
1968Code:2008Code:X
75
ft75
ft
AverageCurb
Elevation Lowest
Level
of
FD
Vehicle
Access
1968Code:2008Code:
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AutomaticSprinklerSystems
Requiredinallbuildingswithfloors>55feetin
heightand
with
an
occupant
load
>30
Requiredinallhighrisebuildingsregardlessofoccupantload(asdefinedinBC403)
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FireDetection&FireAlarms
Highrisebuildingsarerequiredtobeprovidedwith:
Automaticfiredetectionconnectedto
automaticfire
alarm
system
Emergencyvoice
/alarm
communicationsystem
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VoiceCommunicationSystems
ALL highriseoccupanciesrequiretwowayvoicecommunicationsystemsforusebyFDNY
Except:I1,I2andR2occupancies
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VoiceCommunicationSystems
Highriseresidentialbuildings>125ftmust
haveone
way
voice
communication
systems
Requiredfromthelobbypaneltoeach
dwelling
unit
and
vertical
exit
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FireCommandCenter
RequiredinALL
highriseoccupanciesinthe
lobbyon
the
entrance
floor
for
Fire
Departmentoperations
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EmergencyPowerSystems
Requiredinhighrisebuildingsand
residentialbuildings
>125
feet
to
provide
backuppowerforemergencysystems
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ElevatorLobbies
Whenelevatorsopenontoafireresistance ratedcorridorOR
WhenelevatorsserveaGroupBoccupancywith
four
or
more
stories
Elevator
SmokePartitionElevatorLobbyFireRatedCorridor
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ImpactResistantStairs/Elevators
Stairandelevatorenclosuresinhighrise
buildingsmust
be
constructed
of
impact
resistantwalls
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StairDesign
WiderStairwayWidth
44 min.stairwaywidthrequiredinALL occupanciesexcept:Stairways
that
handle
50
persons
cumulativeforallstories
R2occupancies
not
more
than
125 highandeachstairwayserves
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StairDesign
EaseofStep
7 max.risersand11 min.treadsrequiredinALLoccupanciesexcept:oR
2occupancies
oR2dwellingunits
oR3residentialoccupancies
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SmokeProofEnclosures
OpenExteriorBalcony
ExteriorWall
FireRated
Enclosure
Open Exterior Balcony
FireRatedEnclosure
44
OpeningtoExterior
ExteriorWall
72
Naturally Ventilated Vestibule
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PostFireSmokePurgeSystems
Requiredinallhighrisebuildingsandother
buildingslisted
in
section
BC
912
Intendedforthetimelyrestorationofoperations
and
overhaul
activities
once
afire
is
extinguished
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ElevatorsasMeansofEgress
Maybeusedasacomponentofaccessiblemeans
ofegress,exceptin:
1.
Residentialbuildings> 125feetinheight
1. Inotheroccupancieswheretheoccupiedflooris> 75 abovethelowestleveloffiredepartment
access
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Photoluminescent RequirementsAllnewlyconstructedhighrisebuildings,exceptR2occupancies
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SuperHighRiseBuildings
Buildingstallerthan300feet:
Redundantautomaticandgravityfedwater
supplies
Largertanksizesforonsitestorageofwaterfor
firefighting
purposes
DedicatedexpressSiameseriser Zonedsystem
Onsitesecondarywatersupplyrequiredatbuildings
taller
than
300
feet
and
in
Seismic
Design
CategoryCorD
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StructuralDesign
ProposedStructuralIntegrityProvisions
Applicabletoallbuildings
o
VehicularImpactDesignLoadrequirement,Section1625.5
o
HighpressureGasexplosionDesignLoadrequirement,Section1625.6
o
ContinuityandTiesrequirements Requiringadditionalstrengthanddetailing
ofmembersandtheirconnections
SteelConstructionSection2213
Structural
Steel
Members
CompositeConcreteSlabsonMetalDeck
ConcreteConstructionSection1917
Cast
In
Place
Concrete
PrecastConcrete
MasonryConstruction
Section2114
Bearing
walls
Piers&Columns
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StructuralDesign
StructuralIntegrity KeyElementAnalysis
KeyElementAnalysis Section1626
TwoOptions:o
Alternate
Load
Path
Method
Design
to
preventa disproportionatecollapseassumingaKeyElement
willfailduetoanextremeevent
oSpecificLocal
Resistance
Method
Designkeyelementsforcodeprescribedloads
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StructuralDesign(cont)
KeyElement
Analysis
required
for:
Buildingsmorethan600feet(183m)tallormorethan1,000,000
square
feet(92903m2)
EssentialFacilitieslargerthan50,000squarefeet(4645m2)
Building
with
an
Aspect
Ratio
greater
than
7
Buildingstallerthan7storieswhereonestructuralmembersupports
morethan15%oftheaggregatebuildingarea
Buildingsdesignedusingnonlineartimehistoryanalysisorutilizing
specialseismicenergydissipationsystems(BaseIsolationorDampers)
Structural
Peer
Review
by
a
qualified
independent
structural
engineer
also
required Section1627
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BuildingUnderConstruction
StandpipeAirPressurizedAlarmsLocalLaw64of2009
Airpressurizedalarmsonstandpipesystemsat:o
Newbuildings75feet+
o
Full
Demolitions
Required:
o
Drawingsofalarmsystem
o
Alteration2StandpipeApplication&Permit
Testing
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BuildingsUnderConstruction
StandpipeHydrostaticPressureTestingLocalLaw63of2009
Hydrostatic
pressure
tests
must
be
performed
on
standpipes
at:
o
Newbuildings75feet+
o
FullDemolitions
o
Certainalterationwork
Required:
o
Alteration2StandpipeApplication&Permit
Testing
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WhereDoWeGofromHere?
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WhatsHappeningOutsideNYC?
ChangestotheICC
Buildingstallerthan420feet:
Two sprinklerrisersservingeachsprinklerzone Three exitstairs
oExceptionforR2(residential)buildings
oExceptionforbuildingswithoccupantevacuationelevator
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Questions?ThisconcludestheAmericanInstituteofArchitectsContinuingEducationSystemsCourseNYCDepartmentofBuildings
BuildingsUniversityAIAPointofContact:
AllisonGinsburg
allisongo@buildings.nyc.gov
2125664415
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