aes report 09

1

Project report on American Embassy School

Presented by:

Civil team: Deependra Vikram Singh

Shubham Asthana

Shivalika Anand

Pratibha Pathak

Services team: Amitesh Gothania

Deepak Mittal

Project Guide:

Mr. K. Stanley Unni

(Project Manager- American Embassy School)

2

ACKNOWLEDGEMENTS

Words are inadequate to express our heartfelt and sincere thanks to our guide Mr. K. Stanley

Unni for his precious advice, enthusiastic and constant encouragement and valuable suggestions

throughout the project period.

We also take this opportunity to express our indebtedness towards the invaluable guidance

offered by Mr. P.K Rakheja (Vice President Delhi Region) and Mr. M.K Dubey (Project Co-

ordinator American Embassy School) as a co-guide.

We also express our gratitude to the staff of American Embassy School for granting us

permission and helping us to collect the relevant data for our records and reference.

We will be failing in our duty if we do not thank adequately all the members of the SPCL staff

and collegues of the Delhi region for their help in completing the project work.

3

INDEX

PART – I CIVIL

Page No.

1. Introduction 9

2. Salient features and major works 11

3. Key Contract conditions 14

4. Mobilization 15

4.1 Site utilization Plan 15

4.2 Labour 16

4.3 Material 18

4.4 Machinery 19

4.5 Staff deployment 21

5. Execution 22

5.1 Excavation 22

5.1.1 Scope 22

5.1.1.1 Quantity 22

5.1.1.2 Dismantling / Demolition 23

5.1.3 Mode of measurement for Hard rock excavation 24

5.2 Shuttering 26

5.2.1 Repetitions 28

5.2.2 Shuttering Usage Ratio 28

5.2.3 Members 30

5.2.3.1 Columns 30

5.2.3.2 Cills and Lintels 30

5.3 Concrete 31

5.3.1 Scope 31

5.3.2 Challenges faced 32

5.4 Reinforcement 33

5.4.1 Scope 33

5.4.2 Equipments used 33

4

6. Finishing 34

6.1 Flooring 34

6.1.1 Terrazo tiles 34

6.1.2 Kota stone 35

6.1.3 Ceramic tiles 36

6.1.4 IPS flooring 37

6.2 Wall finish 37

6.3 False ceiling 37

6.4 Corian Stone partitions 38

6.5 External façade 39

6.5.1 Delhi Quartzite stone cladding 39

6.5.2 Grit wash 40

6.5.3 Terracota Jali work 41

7. Terrace Waterproofing 42

8. Quality 45

9. Safety 46

10. Learnings 49

PART – II SERVICES

1. Introduction 51

2. Scope of Work 52

3. HVAC (Heating, Ventilating and Air Conditioning) 53

3.1 HVAC Equipment 53

3.2 Sequence of HVAC work 56 3.3 Material Required 57

3.4 Specification of Main Items 61

3.5 Important point to be checked at the time of Installation 66

3.6 Working Principle of HVAC system 67

5

3.7 Refrigeration cycle description 68

3.7.1 Operation 68

3.2 Evaporator 69

3.7.3 Absorber 69

3.7.4 Generator 69

3.7.5 Heat Exchanger 69

3.7.6 Condenser 70

3.8 Valves 70

4. Green building 71

5. BMS (Building Management System) 73

5.1 Field Devices (Sensors) For BMS 73

5.2 Field Level Controllers 73

5.3 Supervisory Level 73

5.4 Fire Alarm System 75

5.5 Public Address System 76

6. Electrical 78 6.1 Electrical System 78

6.1.1 Source of power supply 78

6.2 Electrical Internal Wiring 82

6.3 Main LT Panel 84

6.4 Earthing 85

6.5 Important Points to be remembered 85

7. Fire Fighting 86-92

6

LIST OF FIGURES Part 1 (Civil)

Fig 1 An artistic impression of the school 09

Fig 2 Octagonal shape of the structure 12

Fig 4.1.1 Uprooting of trees 15

Fig 4.1.2 Shifting of tree for transplant 16

Fig 4.2.1 Provision of Cold water for drinking 17

Fig 4.2.2 Toilets 17

Fig 4.3.1 Unloding of Reinforcement 18

Fig 4.3.2 Shifting of Reinforcement 19

Fig 5.1.2.1 Jack hammer 23

Fig 5.1.2.2 Rock breaker 24

Fig 5.1.3.1 Bucket excavator 25

Fig 5.1.3.2 Fissures being created manually 25

Fig 5.2.1 Cup Lock TITAN HV System 27

Fig 5.2.2 Easy De shuttering 27

Fig 5.2.3 Faster release of material 27

Fig 5.2.2.1 Deviation of Shuttering Usage Ratio 29

Fig 5.2.3.1.1 Making of Formwork for chamfered edges in columns 30

Fig 5.3.1.1 Exposed surfaces of Concrete 31

Fig 5.3.2.1 Exposed slab concrete 32

Fig 5.3.2.2 View of exposed concrete from the courtyard 33

Fig 6.1.1.1 Fixing of Tiles 34

Fig 6.1.2.2 Unpolished Kota Stone with inlay of 100mm Udaipur green marble 35

Fig 6.1.2.1 Polished Kota Stone 36

Fig 6.1.3.1 Flooring and dado with Ceramic tiles 36

Fig 6.3.1 Acoustic false ceiling 38

Fig 6.4.1 Pre Polished Corian Stone used in WC partitions 38

Fig 6.5.1.2 DQ stone cladding with SS angle after 4th layer of stone 40

Fig 6.5.2.1 Grit wash done by making panels using wooden beading 41

Fig 6.5.3.1 Terracota Jali used as an elevation feature 41

7

Fig 7.1 Layer of cold bitumen primer 42

Fig. 7.2 Polymetric mats laid for water protection 42

Fig 7.3 Expanded polystyrene with ship lap joints 43

Fig 7.4 Layer of Pee gravels 43

Fig7.5 Section of terrace waterproofing 44

Fig. 8.1 Quality lab on site 45

Fig 9.1 Graph for cumulative man hours worked v/s safe man hours 46

Fig 9.2 Fire drill program 47

Fig 9.3 Site barricading for clear passage way 48

Fig 9.4 Foam protection at the joints 48

Part 2 (Services)

Fig 1 Types of Services 52

Fig: 3.1 Vam Machine 53

Fig: 3.2 TFA (Treated Fresh Air) 54

Fig: 3.3 Cooling Tower 54

Fig: 3.4 Complete HVAC System Inside the building 55

Fig: 3.5 Pumps installation at site 56

Fig: 3.6 Schematic flow Diagram of HVAC System 67

Fig: 3.7 Li B r - H2O CYCLE 68

Fig: 5.1 Showing the location of all sensors and detector in a building. 74

Fig 5.2 BMS system Architecture 74

Fig: 6 Electrical Power Flow 78

Fig:6.1 TCG 2016 V 16 GAS GEN SET 79

Fig: 6.2 Piping Of GG 79

Fig: 6.3 Power Panel, Cabling and Bus Duct 80

Fig: 6.4 Main LT Panel 84

Fig: 7.1 Sprinkler heads 86

Fig: 7.2 Insight arrangement of fire door 87

8

PART I (CIVIL)

9

CHAPTER 1

INTRODUCTION

Located on twelve acres in the heart of the diplomatic community of New Delhi, the American

Embassy School is one of the premier schools of Delhi imparting quality education to every

child. The buildings have been designed to blend into a small rocky hill and lend a friendly,

informal atmosphere to the school. This is a coeducational, independent day school, which offers

education from preschool to +2 level. At present, the New Delhi American Embassy school

enrolls more than 42 nationalities. It houses different facilities like libraries, centre for physical

education, modernized buildings and performing arts. Surrounding the American Embassy

School are the prestigious embassies of countries viz. Greece, Saudi Arab, Sultanate of Oman

and Qatar embassies.

Fig 1 An artistic impression of the school

The Project was a part of the expansion works of the American Embassy school. The American

embassy school comprises of three different blocks viz. Elementary school, Primary School &

10

High school. It was SPCL who had constructed the Elementary school and Primary school. Thus

this project may be considered as a repeat order for SPCL.

The project comprised of the dismantling of the existing High school block which was a G+1

structure with a new LGF+GF+2 structure. The complete project constituted the demolition of

the existing structure, arrangement for the relocation of the students during the construction

phase, construction of the school building with finishing and services and followed by the

landscaping works.

Of the above, the construction of the new school building along with the complete finishes was

put into the scope of SPCL and also the demolition of the foundations of the old structure. SPCL

was later on awarded the Co-ordination of the Services.

The building comprised of the state of the art facilities for the students viz. with top class

interiors and exteriors with the most modern gadgets The school building produces its own

power and the power consumption is monitored and controlled by the latest BMS technology.

The cooling and heating is not only controlled by sensors but the entire design of the building is

such so as to absorb minimum heat and allow maximum natural light by way of its octagonal

shape with a open-to-sky courtyard within the building, large windows, tinted laminated glass on

south and east faces, terracotta jail work on shafts and a 150mm thick polystyrene insulation on

the terrace. State of the art insulations on the cooling towers and plant room restricts the

vibrations and sound levels to a near zero level. Natural materials like Kota stone, Delhi

Quartzite Stone cladding, Grit wash, Terracota, Marble puts the building in harmony with nature.

No wonder that this building is on its way for a Silver Rating LEEDS Certification.

Key Players

The work was awarded to SPCL by the American Embassy School who were thus the client for

SPCL. The conceptual design of the building was made by an American architect John Derik

but the entire work was executed with Arcop Associates Pvt. Ltd as the architect . Desman was

the Structural Consultant while Sanelac was the services consultant.

11

CHAPTER 2

SALIENT FEATURES & MAJOR WORKS

The main feature of the building was in the shape of the building which blended the existing

landscape and rocky terrain with the structural design. The building is an octagonal shape in plan

with an open courtyard in the centre. The structure foundations are at three different levels. The

first level is the raft for the basement which accommodates a compactly designed plant room

enclosed by RCC Retaining walls. The lower ground floor is the next level which is in the shape

of a “ C ” and accommodates the laboratories along with a lovely courtyard and a rocky wall

closing the floor on one side The third level of foundations is on the ground floor which

comprises of classrooms and a breakout space which opens out into the existing building.

Further the building is structurally connected to the existing building by a bridge on the first

floor which directly connects the two structures . In totality the building is a (Basement + LGF+

G+2 ) structure .

12

Fig 2 Octagonal shape of the structure

SPCL was initially awarded the Civil works for the project which comprised of the dismantling

of existing foundations, Structure works and finishing works comprising of Flooring,

waterproofing, Aluminium Doors and windows etc.

13

The quantity wise breakup of some major works as per contract was as follows:-

Table 2

The LOA Issued to SPCL for the civil works including the finishes was of Rupees Ten crores

and fifty five lakhs. SPCL was further awarded the co-ordination of the services’ works. The co-

ordination amount was Rupees. The contract period was of Twelve months for the complete

execution and handing over.

EEaarrtthhwwoorrkk 22665555 ccuu..mm

FFiilllliinngg 11550000 ccuu..mm

SShhuutttteerriinngg 1100000000 ssqq..mm

RReeiinnffoorrcceemmeenntt 330055 MMTT

CCoonnccrreettiinngg 22330000 ccuu..mm

MMaassoonnrryy 440000 ccuu..mm

PPllaasstteerr 99550000 ssqq..mm

TTeerrrraazzoo ttiilleess 33330000 ssqq..mm

KKoottaa ssttoonnee 11550000 ssqq..mm

CCeerraammiicc ttiilleess 11115500 ssqq..mm

DDQQ SSttoonnee ccllaaddddiinngg 443300 ssqq..mm

GGrriitt wwaasshh 660000 ssqq..mm

PPaaiinnttiinngg 88880000 ssqq..mm

SSttrruuccttuurraall sstteeeell 77 MMTT

FFaallssee cceeiilliinngg

GGyyppssuumm BBooaarrdd 11773366 ssqq..mm

GGrriidd CCeeiilliinngg 11007766 ssqq..mm

AAlluummiinniiuumm wwoorrkkss 6600 LLaaccss..

RRooaadd wwoorrkkss 66 LLaaccss..

14

CHAPTER 3

KEY CONTRACT CONDITIONS

The contract was an item rate contract with no provision for any escalation.

15% of the contract value was to be released as mobilization advance which was to be recovered

from the 2nd RA Bill in 10 equal installments.

SPCL had to submit Bank Guarantees against mobilization (15% of CV ), Performance (5% of

CV valid till 12 months from date of completion of work) & Retention (5% of RA Bill including

extra items)

Liquidated damages to be levied at 0.5% of CV per week to a maximum of 5% of CV .There was

also a provision for a Bonus of 0.25% of CV per week to a maximum of 5% of CV for early

completion.

Defect Liability Period was 12 months.

Allowable Quantity variation was 15% exceeding which the rates would be revised as per mutual

agreement.

Water and Electricity was to be supplied by client free of cost .

15

CHAPTER 4

MOBILIZATION

4.1 Site utilization plan

The mobilization process is a very vital step for any project . At the American Embassy school

project the difficulties compounded on various accounts. The work was to be executed in a VIP

area, in an existing working school campus, existing landscaping to be unaffected including

trees, rocks etc.

The site utilization plan was prepared taking into account the above restrictions and limitations.

The site was first and foremost isolated from the existing school campus by a complete

barricading. The shuttering and reinforcement yards were established at reasonably flat areas

without any damage to the undulating rocky terrain. The trees within the vicinity were uprooted

and transplanted elsewhere in the school premises.

Fig 4.1.1 Uprooting of tree

16

Fig 4.1.2 Shifting of tree for transplant

4.2 Labour

Due to space constraints the labour camp could not be accommodated at the site. Also since it

was a very VIP area, the installation of labour camp just outside the site was not possible. Thus

local labour was deployed.

Also rooms were hired for the transit labour in the nearby vicinity . Further arrangement of

accommodation was put into the scope of PRWs/ Sub-contractors. Labour welfare was one of the

prime concerns and various facilities were made available for the labour on site as:

• Toilets

• Cold water for drinking

• Canteen

• Safety Jackets

• Registration with labour departments and provision of identity cards

17

Fig 4.2.1 Provision of Cold water for drinking

Fig 4.2.2 Toilets

18

4.3 Material

Since there was an existing school running next to the site, movement of heavy machinery was

not possible during the school hours i.e upto 04:00 pm. Also being a VIP area, permissions and

statutory approvals from the concerned authorities for the movement of machinery was

mandatory. Due to lack of space and the site conditions stacking of material was difficult.

These limitations were overcome by a clear intimation to the suppliers regarding levels of

acceptance of materials and the quantity requirements, constant quality control checks before

unloading and construction of bins for material stacking and avoiding mixing of aggregates.

These restrictions led to the procurement of entire quantum of steel within 5 days. For this the

diameter wise breakup for the structure was calculated by the structural consultant. This 305 MT

of steel was shifted and stacked manually as initially the approach did not exist. This was a

herculean task and its successful completion boosted the morale of the SPCL staff at the very

start of the project.

Fig 4.3.1 Unloading of Reinforcement

19

Fig 4.3.2 Shifting of Reinforcement

4.4 Machinery

The machinery requirements at American Embassy School project was minimal on account of

the small quantities .Also the working of the equipments was to be timed in such a manner that

they did not disturb the surrounding school functioning.

20

The equipments deployed are listed below:

AAiirr CCoommpprreessssoorr 11 NNooss

BBuuiillddeerr HHooiisstt 11 NNooss

MMoonnoo BBlloocckk ppuummpp ((55 HHPP)) 33 NNooss

MMoonnoo BBlloocckk ppuummpp ((77..55 HHPP)) 33 NNooss

MMiinnii ppuummpp ((11 HHPP)) 11 NNooss

EElleeccttrriicc vviibbrraattoorr ((33 HHPP)) 44 NNooss

MM SS CCuutttteerr mm//cc ((1100 aammpp)) 22 NNooss

HHaanndd GGrriinnddeerr ((33..88 aammpp)) 22 NNooss

HHaammmmeerr ddrriillll mm//cc ((33..99 HHPP)) 11 NNooss

CChhiippppiinngg mm//cc ((55..77 aammpp)) 11 NNooss

CCiirrccuullaarr ssaaww mm//cc ((44..77 aammpp)) 11 NNooss

PPeettrrooll vviibbrraattoorr ((33000000 RRPPMM)) 22 NNooss

HHaanndd ddrriillll mm//cc ((11225500 RRPPMM)) 22 NNooss

Table 4.4.1 Machinery deployed at AES

21

4.5 Staff Deployment

The works were executed by a vibtrant, young and dedicated team of individuals. The organization

chart of the site clearly indicates the dedication and productivity of the team. The project was initially

commenced by the civil team who were later on joined by the collegues from the services co-ordination

team.

RO Support

Coordinator-M.K.Dubey

Project Manager-

K.Stanley.Unni

Planning Engineer-

Richi gupta

Safety Officer-

SP.SinghSafety

Steward

P&M-Dept.

Mechanic-Ramesh

Electrician-Surender

Electrician-Chakrabort

y

EngineerQS-

Mohd.Fozir

EngineerQA &QC

Sr. Engineer

Engineer Civil Works

Foreman-Kundan

Supervisor-Piyush

Engineer Finishing

Foreman-Neeraj Supervisor

Services Co-ordinator- Tejvir

Singh Services Engineer-

Noorul Islam

Store Keeper-

John Thomas

Asst. Stores-Mangilal

Time keeper-

Nepal Singh

22

CHAPTER 5

EXECUTION

5.1 Excavation

5.1.1 Scope 5.1.1.1 Quantity

The quantity to be excavated according to the BOQ was 4424 cu.m while the actual quantity excavated was

4424 cu.m. Within this, the quantity payable as under hard rock was 3200 cu.m and the rest 1224 cu.m was

payable under all kinds of soil.

5.1.1.2 Dismantling / Demolition

The existing buildings and structures within the boundary of the site had to be

demolished. The demolition of the super structure was not in the scope of SPCL but the demolition of the

foundation members was . The debris had to be transported from the site on a daily basis due to lack of space.

All the approvals from the local Government Authorities and the necessary deposits was in the scope of SPCL.

23

5.1.2 Methodology adopted

The American Embassy School is built on a rocky terrain. Since Blasting was strictly prohibited, and different

methods were adopted for the excavation depending on the type of rock. The different methods adopted for

the excavation works are described in brief:-

Bucket excavaters (Poclain)- These were deployed effectively for the excavation in loose soil, hard soil and

loose rocks.

Jack hammers were used to dismantle the the foundations of the old building and soft rocks and hard rocks

with fissures.

Tractor mounted compressors with typical drill bits were used to drill holes in hard rocks without any fissures

so as to create an artificial crack and breaking later on.

In case of hard rocks without fissures highly skilled rock cutters were deployed who would work diligently

and dismantle rocks which were then removed from site.

Fig 5.1.2.1 Jack hammer

24

Fig 5.1.2.2 Rock breaker

5.1.3 Mode of measurement for Hard rock excavation

The ground level was recorded at a maximum of 5 meters interval. Average of these readings was taken as the

average ground level and depth of excavation in cutting was computed from these spot levels.

Bottom width excavation was measured as given in foundation drawings and details showing the width of the

bedding concrete only and hence the side clearance was covered in the rates.

Where soil, soft rock and hard rock were mixed, the measurements for the entire excavation were computed

from the levels and dimensions taken.

Excavated materials from ‘HARD ROCK’ and ‘SOFT ROCK’ were stacked separately and measurement was

reduced by 50% to allow for voids to arrive at the quantity payable under ‘hard rock’ and ‘soft rock’

respectively.

25

The difference in the entire excavation (worked out from levels) and the quantities payable under ‘hard rock’

and ‘soft rock’ were paid as excavation in all kinds of soil.

Fig 5.1.3.2 Fissures being created manually

Fig 5.1.3.1 Bucket excavator

26

5.2 Shuttering

The type of shuttering used at American Embassy School was Cup Lock TITAN HV System.

The advantages of Cup lock Titan HV system:

• Allows fast and systematic erection and dismantling.

• Uses light weight aluminium beams.

• Drop heads allow easy de shuttering of the ply on infill beams.

• Requires Minimal space for storage.

• Provides easy accessibility.

Fig 5.2.1 Cup Lock TITAN HV System

27

Fig 5.2.2 Easy De shuttering

Fig 5.2.3 Faster release of material

The structural work at AES

was initially planned for 8

months which was later

brought down to 6 months

due to various delays i.e the

start of structure works was

delayed by almost 2 months.

To cover up with this loss of

time, work at every possible

front was started.

28

5.2.1 Repetitions

It is the number of times the shuttering material is utilized (repeated). Average number of repetitions achieved

at AES was (16945 / 2547) = 6.7 repetitions.

The reasons for low repetitions are : (1) The time span for the structure to be completed was very short. This

did not allow the material to be fully utilized (repeated). (2) The clients requirement of exposed concrete

meant that the shuttering material that was being used was supposed to be in the best of the condition. (3) Due

to the delay in start of the structure part maximum available fronts had to be covered, which meant utilization

of more material than that was planned.

5.2.2 Shuttering usage ratio (SUR)

The shuttering usage ratio is defined as the Quantity of shuttering done / Total Quantity of shuttering material

available. Due to the technicality of the structure (i.e octagonal shape & requirement of exposed concrete) the

SUR planned as per PSE was 1.13 while the achieved SUR was 0.73. Various reasons attributed to low SUR

such as: (1). The initial material procured was 1444 sq.m while the material consumed was only 580 sq.m. (2).

The requirement of exposed concrete asked for the formwork to be in the best condition at all times. Re-usage

of shuttering material was done with utmost care. (3). After the major portion of structure was over the

material could not be dispatched to the store or any other site.

29

Fig 5.2.2.1 Deviation of Shuttering Usage Ratio

0.40.46

0.81

0.96

1.211.24

0.19 0.13

1.28

0.73

1.05

0

0.2

0.4

0.6

0.8

1

1.2

1.4

Dec Jan Feb Mar Apr May Jun Jul Aug sep

SUR

Months

SUR

Avg. Planned

Shuttering Usage Ratio

5.2.3 Mem

5.2.3.1 Co

The column

5.2.3.2 Ci

The cills an

mbers

olumns

ns were exp

Fig 5

ills and L

nd lintels we

Cha

posed and h

.2.3.1.1 Ma

Lintels

ere also exp

Shut

amfered edg

ad chamfer

aking of For

posed and w

ttering Boar

ge

Shuttering

ed edges as

rmwork for

were project

rd

g Board

s shown belo

chamfered

ting outward

ow.

edges in co

ds approxim

olumns

mately 100m

mm.

30

31

5.3 Concrete

5.3.1 Scope

The planned concreting that was to be done as per BOQ was 2655 cu.m while the actual quantity of concrete

that was consumed was 2640 cu.m.

Due to the acute space constraint and very less concrete quantity it was not feasible to install a batching plant

on the project. The concrete production on the project was from a single RM-800 for the casting of irregular

pours viz. columns, mullions, parapets etc and Ready Mixed Concrete for major pours in slabs

Fig 5.3.1.1 Exposed surfaces of Concrete

32

5.3.2 Challenges faced

Since the requirement was of exposed concrete, there was absolutely no room for repairs on the surface of

concrete. This led to the use of extra supporting in shuttering, involvement of more labour and time, just an

appropriate use of vibrator was very vital for the concrete surfaces to be free from honeycombing. Also, as

concreting requires the use of vibrators which creates noise pollution, this activity could not be performed

during the day time, as there were restrictions on the timings due to the running of school in the nearby

vicinity.

Fig 5.3.2.1 Exposed slab concrete

33

5.4 Reinforcement

5.4.1 Scope

Quantity according to the BOQ was 305 MT which was procured at the start of the project, while the actual

quantity executed was 304.26 MT. This is a variance of 0.74 MT i.e 0.24%.

5.4.2 Equipments used

For cutting and bending of reinforcement one cutting machine and one bending machine were deployed at the

site.

Fig 5.3.2.2 View of exposed concrete from the courtyard

34

CHAPTER 6

FINISHES

The entire finishing was in the scope of SPCL Except for the interior decorations/loose furniture.

6.1 Flooring

The flooring package comprised of different types of flooring for different areas viz:-

• Terrazo Tiles flooring in classrooms and laboratories.

• Kota stone flooring on corridors and staircases.

• Ceramic Tiles in Toilets.

• IPS Flooring in Electrical rooms and Plant room.

• Grit wash flooring around the building

• Mosaic flooring in courtyard.

6.1.1 Terrazo tiles flooring

The tiles were unpolished precast Terrazo tiles

purchased from NITCO (Northern India Tile

Company) of regular size 300mm x 300mm x

25mm. These tiles were laid over an average bed

thickness of 20mm of cement mortar 1:4 with

utmost care given to produce perfect joints and

edges. These joints were then grouted, followed by

grinding and polishing. For the protection of this

finished flooring, Plaster Of Paris was laid over a

polythene sheet.

Fig 6.1.1.1 Fixing of Tiles

35

6.1.2 Kota stone flooring

Kota stone was procured as per approved sample. Initially rough kota stone was laid which was later on

changed to polished kota for which polishing was done after first handover. The regular size of the stone was

550mm x 500mm interspaced with 100mm strips and inlay of 100mm Udaipur green marble bands. Kota stone

was also laid on the staircases with treads and risers of a single stone having moulded edges with nosing. The

skirting was projecting outwards and had chamfered edges.

Fig 6.1.2.2 Unpolished Kota Stone with inlay of 100mm Udaipur

green marble

6.1.3 Cer

The Ceram

Fig 6.1.3

ramic tiles

mic tiles w

3.1 Flooring

s in Toilet

were laid in

g and dado

Fig 6

ts

n the toilet

with Ceram

6.1.2.1 Polis

ts of “Glac

mic tiles

shed Kota S

cier white”

The

was

the

tiles

Stone

” shade pur

e size of the

s used in fl

Dado was 2

s in the toile

rchased fro

e tiles was 3

looring and

2.4mts.

ets.

om ORIEN

300mm x 30

dado. The

36

NT TILES.

00mm and

height of

37

6.1.4 IPS Flooring

Indian Patent Stone Flooring was done in the plant rooms and Electrical rooms. Thickness was of 40mm and it

was laid in two layers, the first layer was 28mm thick while the second layer was 12mm thick.

6.1.5 Wall Finish

The wall finishing comprised of plaster with a 6-8mm layer of POP Punning which was painted as per the

approved shade. Different types of paints were used for different areas viz:-

Plastic Emulsion paint of “Berkeshire white shade” from Dulux was used for the interior walls i.e inside the

classrooms etc.

Apex Emulsion paint was used for the exterior walls i.e along corridors.

Synthetic Enamel paint was applied on the Door frames and Railings.

6.2 False Ceiling

The American Embassy school had two different types of false ceiling viz. Acoustic tiles & Gypsum board

false ceiling especially designed to cater to the minimum/maximum lux levels and also maintain efficient

cooling and noise insulation.

1) Acoustic Tiles of Armstong make were used in the project. The material i.e tiles and grid material was

procured by the client so as to avail the exemptions available to the embassies and the installation was

done by SPCL.

2) Gypsum Boards of India Gypsum were used along with jointing tapes and compound which were fixed

onto GI members supported from the ceiling by Fasteners.

38

6.3 Corian Stone partitions in Toilets

Fig 6.2.1 Acoustic false ceiling

Corian Stone is actually not a stone but is an

acrylic polymer sheet which is readily washable

and easy to maintain.

The toilets of the AES were of Corian stone

partitions mounted over SS Fittings. Corian stone

of 12mm was used with SS Channels and fixtures.

Fig 6.3.1 Pre Polished Corian Stone used in

WC partitions

39

6.4 External Façade

The Architect made it a point to design the building in such a manner so as to blend not only with the existing

school buildings but also the terrain. Also special attention was made to make the use of natural materials as

far as possible as per the norms of DUAC (Delhi Urban Architectural Committee). The external Façade

comprised of :-

• Delhi Quartzite stone Cladding

• Grit wash.

• Terracota Jali work

• Exposed Concrete finish

6.4.1 Delhi Quartzite stone cladding

DQ Stone which was locally available was dressed to the required shape and size with a thickness of 75mm -

100mm and fixed with a mortar backing of 120mm. SS angles of size 90x90x8mm were anchored with

fasteners on to RCC members at every 4th layer of stone so as to prevent and falling of stone from heights.

40

6.4.2 Grit wash Grit wash was done using locally available aggregate of size 10mm and downsize. Panels were

made using wooden beading.

Fig 6.4.1.2 DQ stone cladding with SS angle after 4th layer of stone

41

Fig 6.4.2.1 Grit wash done by making panels using wooden beading

6.4.3 Terracota Jali work

Fig 6.4.3.1 Terracota Jali used as an elevation feature

Terracota Jali was used to enclose staircase

and shafts. Terracota tiles of approved design

and size of 15mmx 150mm were used. These

were reinforced by using 3mm thick GI wire

at every 3 layer of tile.

42

CHAPTER 7

TERRACE WATERPROOFING

An exceptional feature at AES was the Terrace waterproofing. The typical features adopted for resisting water

leakages inside the building sets it class apart from the general methodology used. Thermal insulation

provided in the roof slab isolates the building from the precarious climate and helps retain the temperature of

the building, saving an accountable amount of energy from the external sources.

Over the RCC slab, PCC 1:4:8 was applied with

a slope and having an average thickness of

75mm. A layer of cold bitumen primer was

applied at 0.3 lt/sq.m over the entire surface to

cater to the requirement of a base for

waterproofing.

A layer of APP Polymetric mats (in the form of

sheets) 3 mm thick was overlapped on one

another and the joints welded in such a manner so

as to generate a smooth flow of water into the

drain along the periphery.

For providing extra protection from the

penetration of water inside the building, another

layer of polymetric mats was laid in the

perpendicular direction in the same manner.

Fig 7.1 Layer of cold bitumen primer

Fig. 7.2 Polymetric mats laid for water protection

43

Fig 7.4 Layer of Pee gravels

A MOPLY mineral membrane 4 kg/sqm was applied on the vertical surfaces on the terrace.

These layers were succeeded by three

layers of extended polystyrene 50mm

each were laid to provide thermal

insulation. This 150mm thick layer

granted absolute isolation from the

outside atmosphere. A layer of

DRENTEX 40 drainage mat was laid to

prevent water from penetrating inside

the polystyrene layers

A Geo textile layer, Terram

1500 was laid over DENTREX

40. A 100m thick layer of Pee

Gravel was laid on the top so

that the voids that are created

by these gravels which add to

the thermal insulation which is

a Green building concept. Also

the rain water percolates

through this layer and leaves

the other unwanted materials

(leaves and stems etc.) on the

surface only and the Pee

gravels resist the flying off of

the geo textile layer.

Fig 7.3 Extended polystyrene with ship lap joints

44

Fig7.5 Section of terrace waterproofing

45

CHAPTER 8

QUALITY

The quality standards maintained at the American Embassy School was remarkable. Apart from

the requirements of high quality standards by the clients, SPCL itself ensured an exalted check

on the quality in every possible aspect. In accomplishing an exceptional degree of quality, inspite

of space constraints a Quality Lab was installed on the site.

The laboratory was headed by a Quality Engineer who inspected and conducted tests on

concrete, concrete ingredients, soil and other construction materials for their strength and other

parameters. Visible tests were conducted at the time of unloading of the materials only, and no

deficient material was carried into the site premises. To adhere to our motto of delivering a

quality product we shared our knowledge on a weekly basis in the weekly meetings conducted

on site.

Fig. 8.1 Quality lab on site

46

CHAPTER 9

SAFETY

Fig 9.1 Graph for cumulative man hours worked v/s safe man hours

The graph above shows the exceptional performance by SPCL wherein the cumulative man hours

overlaps the safe man hours worked, i.e not a single hour was lost due to unsafe reasons.

A commendable job was performed by the safety personnel at the American Embassy School. The

SPCL employees paid great attention towards safety and helped in maintaining a safe working

environment at the site. This was a 100% safe site and such exemplary standard was achieved by various

steps taken towards educating the labour and the staff like the Daily tool box meeting and fire drill

program etc.

0

200000

400000

600000

800000

1000000

1200000

1400000

cumulative man hrs

First Aid

Safe Man Hours Worked

Also variou

lifting equip

Safety prec

G.I sheet us

us other me

pments, bar

cautions wer

sed for mak

easures were

rricading th

re taken me

king bounda

Fig 9.

e taken like

e required a

eticulously a

aries were p

.2 Fire drill

e maintenan

area and pro

and in every

protected by

l program

nce of safety

oviding a cl

y feasible as

y applying fo

y records, th

ear passage

spect for e.g

oam.

hird party te

e in all areas

g. even the j

esting of all

s.

junctions of

47

l the

f the

48

Fig 9.3 Site barricading for clear passage way

Fig 9.4 Foam protection at the joints

49

CHAPTER 10

LEARNINGS

Every single day in SPCL has taught us something or the other. Comparing ourselves from the day we

joined SPCL to this day we find an immense increase in the level of confidence and knowledge. The

theoretical knowledge obtained in the colleges has come to its practical application. To summarize our

learnings in a very broad sense we can segregate them as:

• Functioning of the company and the requirement of each department (HO, RO & the Site)

• Further sub divisions of the departments in the RO & the site.

• Co ordination between each department

• Work procedure to be followed from the very start i.e. :

o Selecting a suitable tender

o Bidding for the tender after rate analysis and arriving at a competitive tender cost

o Contractual conditions applicable

o Mobilization at the site

o Various statutory approvals

o Execution according to the technical specifications and scope of each department at the site

o Cost as well as progress monitoring

o Importance of maintenance of records and correspondences

o Handing over of the site

50

PART – II (SERVICES)

51

CHAPTER 1

INTRODUCTION

Civil gives a firm building but it breaths through services. Service gives life to the building. Except

Structure all other facilities comes in services. Air conditioning, electrical, Building management

system, lift, plumbing, fire fighting these are common services which we generally find in building

services.

Services

HVAC

Electrical

Plumbing

Fire

Fighting

BMS

R.O. System

52

CHAPTER 2

SCOPE OF WORK SPCL was awarded the co-ordination work of the various services within the school premises. The

agencies were nominated by AES whose working was to be co-ordinated by SPCL. The various

agencies involved have been listed below:-

Total Rs.7,71,08,041.00 Rs. 8,56,81,195.00

Service Coordination Fee as per Contract Rs. 87,80,000.00

Add Service Tax and VAT Rs. 10,37,227.00

Total Coordination Fee Rs. 98,17,227.00

Total project cost Rs. 9,54,98,422.00

Table: 1

S. No. Name of Subcontractors Type of worksoriginal revised

1 M/s Ronsan Electrical Rs. 1,23,11,700.00 1,61,77,804.00Rs. 2 M/s Firepro System Pvt. Ltd. Fire fighting Rs. 24,24,708.00 23,81,290.00Rs. 3 M/s Quality Conscious ContrcPlumbing Rs. 66,40,535.00 90,96,454.00Rs. 4 M/s Sanvik Engineers (I) Pvt. HVAC Rs. 1,89,61,344.00 Rs. 1,95,13,647.00 5 M/s Johnson Control India PvBMS Rs. 19,67,900.00 20,20,431.00Rs. 6 M/s Schindler India Pvt. Ltd. Lift Rs. 24,53,074.00 24,53,074.00Rs. 7 M/s Adwyn Chemicals Pvt. LtdR.O. System Rs. 30,00,000.00 25,66,630.00Rs. 8 M/s Bright Insulations Insulation Rs. 35,97,846.00 33,95,807.00Rs. 9 M/s Green Power InternationGas generator Rs. 1,42,83,000.00 1,41,49,126.00Rs. 10 M/s Adarsh steel fabricators Fabrication Work Rs. 13,03,049.00 17,56,799.00Rs. 11 M/s Adleck Systems Pvt. Ltd. Panels Rs. 23,33,660.00 38,79,193.00Rs. 12 M/s Hilti India Pvt Ltd. Fire proof Material Rs. 7,23,404.00 7,23,404.00Rs. 13 M/s Concrete Solutions Application of Fire Proof Mate Rs. 1,97,473.00 2,60,344.00Rs. 14 M/s Shri Ram Electrical Work Electrical Rs. 21,99,724.00 24,73,743.00Rs. 15 M/s Indersons Supply of Armoured cable Rs. 12,46,613.00 12,46,613.00Rs. 16 M/s South Asian Enterprises Lightning Arrestor Rs. 3,30,312.00 3,13,896.00Rs. 17 M/s Anand Control System UPS Supply Rs. 14,61,640.00 14,61,640.00Rs. 18 M/s Cosmos System Cylinder Refiling Rs. 25,650.00 25,650.00Rs. 19 M/s System Split AC Rs. 97,096.00 97,096.00Rs. 20 M/s Sharp Air Cool Ducting Work Rs. 2,84,788.00 4,24,029.00Rs. 21 M/s HZ insulator Insulation Rs. 1,33,025.00 1,33,025.00Rs. 22 M/s Telecraft E solution EPABX Rs. 10,38,362.00 10,38,362.00Rs. 23 M/s Lokpal Chain Block Rs. 93,138.00 93,138.00Rs.

Contract Amount

53

CHAPTER 3

HVAC

Heating, ventilating, and air conditioning (HVAC) is based on the principles of thermodynamics, fluid

mechanics, and heat transfer. The three functions of heating, ventilating, and air-conditioning are closely

interrelated. All seek to provide thermal comfort, acceptable indoor air quality, and reasonable

installation, operation, and maintenance costs. HVAC systems can provide ventilation, reduce air

infiltration, and maintain pressure relationships between spaces.

3.1 HVAC equipment 1. Vapour absorption machine (VAM):

Vapour absorption machines work on low-pressure steam or hot water as heat source. A

negligible amount of electrical energy is required to operate them.

Fig:3.1 VAM Machine

54

2. TFA (Treated Fresh Air)

Fig: 3.2 TFA (Treated Fresh Air)

3. Cooling tower

Fig: 3.3 Cooling Tower

55

4. FCU (Fan Coil Unit)

5. Chilled water pipe line

6. Diffuser

7. Fresh air duct

8. Exaust air duct

9. Plenum

10. Flexible connection

11. Drain

Fig: 3.4 Complete HVAC System Inside the building

12. Piping

13. Secondary chilled water pump

14. Primary chilled water pump

15. Condenser pump

56

Fig: 3.5 Pumps installation at site

16. Valves

17. Variable-frequency drive, for fine control of pumps

3.2 Sequence of HVAC work

Equipment Installation ( i.) VAM Installation

( ii.) TFA installation

( iii.) Primary, secondary and condenser pump installation

( iv.) Cooling Tower Installation

Accessories Installation ( i.) FCU installation

( ii.) Chilled water pipe line installation

( iii.) Hydro pressure testing of chilled water pipe line

( iv.) Duct installation and silicon filling

( v.) Smoke testing of duct

( vi.) Insulation of Duct and chilled water pipe lines

( vii.) Aluminum Cladding of Chilled water pipe lines( Inside the Building)

( viii.) Cement Cladding of chilled water pipe lines (at terrace)

( ix.) Valves fitting for:

57

(a.) CHW pumps

(b.) Condenser water pump

(c.) Cooling tower

(d.) FCU

( x.) Copper fitting

( xi.) FCU Canvass connection

( xii.) FCU Plenum fixing

( xiii.) Drain installation and insulation

3.3 Material Required

1. FCU installation:

( i.) Drill

( ii.) Fisher/Anchor fastener

( iii.) Stud

( iv.) Nut

( v.) FCU unit

( vi.) Electricity supply ( Panel, Board )

2. Chilled water pipe line installation

(a.) Chilled water pipe line for supply from CHW secondary pump

(b.) Chilled water pipe line for supply from CHW primary pump

( i.) Pipe

( ii.) Elbow

( iii.) Welding machine

( iv.) Welding rods

( v.) Gloves

( vi.) Screen

58

( vii.) Welding goggles

( viii.) Wooden Blocks

( ix.) Gas Cutter (oxygen and DA (Dissolve acetylene) cylinder)

Supports

( i.) Wooden blocks

( ii.) Fastener

( iii.) Drill Machine

( iv.) Angle

( v.) Stud

(d.) Man power (Fitter, welder, and rigger)

3. Hydro pressure testing of chilled water pipe line

( i.) Hydraulic pressure machine

( ii.) water supply

4. Duct installation and silicon filling

( i.) Fabricated Duct

( ii.) Gas Kit

( iii.) Clamp

( iv.) Silicon Paste (adhesive material)

( v.) Silicon filling pump (Silicon gun)

Supports:-

( vi.) Angle

( vii.) Drill machine

( viii.) Fastener

( ix.) Stud

59

5. Insulation

(a.) Duct Insulation

( i.) CPRX Solution

( ii.) Glass Wool with foil

( iii.) Belt

( iv.) Gas Kit (Rubber Pieces)

( v.) Cello Tape

( vi.) Aluminum Foil Tape

(b.) Pipe Insulation (Cladding)

(i.) Thermocol section

(ii.) Aluminum Sheet

(iii.) Screw

(iv.) Belt

(v.) Strip Puncture

(vi.) Polythene

(vii.) CPRX solution

6. Smoke testing of duct

(i.) Smoke bomb

7. Valve Fitting

(i.) Valves

Balancing Valve

Motorised Valve

Drain Valve

Strainer Valve

(ii.) Wrench

(iii.) Holdtight Solution

(iv.) Threads

60

8. Copper Fitting

(i.) Cu Pipe and elbow

(ii.) Brazing rod

(iii.) Gas Cylinders

9. Flexible connection

(i.) Canvass

(ii.) Aluminum

(iii.) Wooden Hammer

(iv.) Drill

(v.) Bolt Nut

(vi.) Gas kit

10. Plenum Fixing

(i.) Duct

(ii.) Fastener

(iii.) Drill Machine

(iv.) Hammer

(v.) Duct Lining

(vi.) Gas Kit

(vii.) Nut

(viii.) Bolt

11. Drain installation and insulation

(i.) PVC Pipe

(ii.) 90o elbow

(iii.) 450 elbow

(iv.) Holdtight.

Support:-

61

(i.) Stud

(ii.) Bolt

(iii.) Angle

(iv.) Drill machine

(v.) Fastener

3.4 Specification of Main Items 1. CHILLER (VAM): S.No. DESCRIPTION

1. MANUFACTURER Thermax Ltd.

2. TYPE VAM

3. CAPACITY 310TR

4. REFRIGERANT Lithium Bromide

CONDENSER:

1. MANUFACTURER Thermax Ltd

2. PRIMARY CHILLED WATER PUMPS:

DESCRIPTION VALUES

A GENERAL

2. Manufacturer SUZHOU Teco Elec & Mech. Corp

B PERFORMANCE DATA

1. Rated Flow (USGPM) 1.12 mm /s

2. Head (ft WC/m WC) 66ft

3. Selected Drive Motor Induction Motor

4. Pump Rated Speed (rpm) 1460

5. Pump Efficiency >75%

C MATERIAL OF CONSTRUCTION

1. Casing CI

62

2. Impellor SS

D DRIVE MOTOR

1. Motor Type S1 / Induction

2. Rating (kW) 11 KW

3. Rated Current 20.7 Amp

4. Rated Voltage 415 V

5. Frequency 50 Hz

6. Power factor 0.83

7. Motor Full load

Efficiency 90.1%

3. SECONDARY CHILLED WATER PUMPS:

DESCRIPTION VALUES

A. GENERAL

2. Manufacturer ITT Bell Gossett

B. PERFORMANCE DATA

1. Rated Flow (USGPM) 1408

2. Head (ft WC/m WC) 66 ft




C. MATERIAL OF CONSTRUCTION

1. Casing CI

2. Impellor SS

D. DRIVE MOTOR

2. Motor Type S1 / Induction

3. Rating (kW) 15 KW



63

6. Frequency 50Hz


8. Motor Full load Efficiency 90.1%

4. CONDENSER WATER PUMPS - VAM

DESCRIPTION VALUES

A. GENERAL

1. Type Split casting centrifugal Pump


3. Quantity 2 No.

B. PERFORMANCE DATA







1. Casing CI

2. Impellor SS

D. DRIVE MOTOR

2. Motor Type Induction / S1

3. Rating (kW) 22 KW / 30HP



6. Frequency 50Hz



64

5. CONDENSER WATER PUMPS - GG

DESCRIPTION VALUES

A. GENERAL

1. Type Split casting centrifugal Pump


3. Quantity 2 No.

B. PERFORMANCE DATA







1. Casing CI

2. Impellor SS

D. DRIVE MOTOR

2. Motor Type Induction / S1

3. Rating (kW) 10Kw



6. Frequency 50Hz



6. COOLING TOWER

DESCRIPTION VALUES

A. GENERAL

1. Capacity 310TR

2. Quantity 1 No

65

3. Type Induce Draft

4. Manufacturer Bell Cooling Tower

B. PERFORMANCE DATA

1. Flow Rate 1408 USGPM

2. Leaving Water Temperature 88 Deg F

C. FAN DATA

1. Fan Speed 960rpm

2. Fan motor HP 7.5KW

3. Fan Motor Speed 960rpm

7. FAN COIL UNITS

S. No. Model No. TR Qty

1 SRC-400-SW-PF-4C 1.0 8

2 SRC-400-HW-PF-4C 1.5 5

3 SRC-600-HW-PF-4C 2.0 9

4 SRC-800-HW-PF-4C 2.5 8

5 SRC-1200-HW-PF-4C 3.0 28

6 SRC-1400-HW-PF-4C 3.5 39

8. Air Washer

S. No Description Data

1 Fan RPM 746

2 Motor Rating 18.5KW / 4 pole

3 Speed 43000 CFM

4 Static Pressure 40 Mwg

9. Exhaust Fan (Plant Room)


1 Fan RPM 746

66

2 Motor Rating 15KW / 4 pole

3 Speed 30000 CFM

4 Static Pressure 40 mWG

10. Treated Fresh Air (TFA) Units


1 Capacity 43 TR

2 Motor Rating 10 KW / 3 KW

3 CFM 11524

3.5 Important Point to be checked at the time of installation

• Wooden Support should not be above FCU.

• Supports should be at proper distance.

• Strainer Valve should be properly aligned otherwise it would not filter the CHW pipe line water

which might cause blockage in FCU.

• Valve should be fitted inside the tray.

• Tapping from main header line should have proper space to carry out the insulation work.

• Valve should be tight using hold tight solution.

• FCU alignment should be at 1800 angle.

67

3.6 Working Principle of HVAC system

Fig: 3.6 Schematic flow Diagram of HVAC System

68

3.7 Refrigeration cycle description

3.7.1 OPERATION Vapour absorption machine consists of two sections in one shell. The lower section houses the

evaporator and the absorber. The upper section houses the generator

and the condenser. The pressure in the lower section is of the order of 6 mm Hg (abs) while the pressure

in the upper section is about 70 mm Hg(abs). LiBr-Water combination is used in the operation of vapour

absorption cycle. Water acts as the refrigerant and LiBr as the absorbent. Solution pump, refrigerant

pump, heat exchanger, purge unit and the control panel complete the machine.

Fig: 3.7 Li B r - H2O CYCLE

69

3.7.2 EVAPORATOR

Refrigerant pump sprays the water over the evaporator tube bundle. The water to be chilled that is

circulating in the evaporator tubes, gets cooled as the refrigerant water in the shell evaporates because of

extremely low pressure in the evaporator shell.

3.7.3 ABSORBER

The refrigerant water vapour goes to the absorber through a mist eliminator. Concentrated LiBr-Water

solution is sprayed over the absorber tube bundle. The refrigerant vapour

is absorbed by the strong solution being sprayed and heat of absorption is removed by cooling water

passing through the absorber tubes. The weak solution form the absorber is sent by the solution pump to

the generator for recovering the refrigerant water vapour.

3.7.4 GENERATOR Weak solution from absorber is heated in the generator with the help of low pressure steam / hot water.

The refrigerant water vapour is evaporated and goes to the condenser. The strong solution is sent down

to the absorber for further absorption of water vapour.

3.7.5 HEAT EXCHANGER

To recover the heat energy form the strong solution returning to absorber a heat exchanger is used. The

cold weak solution being pumped from the absorber picks up excess heat from the strong solution. This

improves cycle efficiency.

70

3.7.6 CONDENSER

The water vapour evaporated in the generator at a higher temperature and pressure is condensed to liquid

form in the condenser where the heat of condensation is picked up by the cooling water from the

absorber inlet circulating in the condenser tubes. The condensed refrigerant water is returned to the

evaporator through an expansion device.

3.8 Valves

Ball valve: - This valve is use for isolating the FCU unit from main header line. Generally it is

used in return side in FCU unit.

Strainer Valve: - Two purposes are fulfilled by this valve. First it is used for isolating the FCU

unit and second it is also used for straining dust and rust from FCU unit.

Balancing Valve: - Flow of chilled water into FCU unit is controlled by balancing valve eg. 1

TR cooling required 2.4 GPM (Gallon Per minutes) water supplies. Generally it is used in return

side so that we can ensure about the water supply into FCU unit.

Motorized Valve: - It is very important valve to automatically regulate the conditioning.

71

CHAPTER 4

GREEN BUILDING

Green Building involves design and construction practices that significantly reduce or eliminate the

negative impact of buildings on the environment and occupants in five broad areas:

1. Sustainable site planning

2. Safeguarding water and water efficiency

3. Energy efficiency and renewable energy

4. Conservation of materials and resources

5. Improving Indoor environmental quality

The American Embassy School has been so designed so as to obtain a “Green Building” certification

from LEEDS. With the existing system the AES is a strong contender to obtain a silver rating.

Various initiatives have been adopted in the school so as to obtain the same. Some of them are as:-

1) The design of the building itself is such to as obtain maximum natural light and requires

minimal cooling. This has been done by the Octagonal shape with an open-to-sky courtyard in

the centre.

2) The Air-conditioning system incorporates a Vapour Absorption Machine which intakes the

waste exhausts from the gas generator and utilises them to generate cooling.

3) The roofing comprises of 150mm layer polystyrene boards which provide adequate insulation

from the scorching sun. Also on the roof is a 300mm thick layer of pea gravel which as acts an

insulation.

72

4) The architectural design takes into account the blending of the building with the existing

landscaping and utilizes maximum amount of natural materials viz. Delhi Quartzite Stone,

Terracota Jali, Grit wash, Kota Stone, etc.

5) Special Initiatives were adopted by AES to reduce the noise and vibrations to a

near zero level by enclosing the entire plant room by a thick layer of acoustic insulation, placing

Resistoflex Anti vibration pads below heavy equipment foundations, insulating the cooling tower

in a canopy etc.

6) The equipment foundation mainly GG and DG foundation has floating foundation with a base of

resistoflex anti vibration pad layer and insulated from the side with 75 mm air gap.

73

CHAPTER 5

BUILDING MANAGEMENT SYSTEM (BMS)

Building management system is a tool that is used to monitor and control various mechanical systems

and/or electrical systems in a building.

Monitoring and control of various parameters are achieved through inputs and outputs.

There are two types of Inputs /Outputs:

Analog: The analog input/output changes continuously in a definable manner in relation to the measured

property.

Digital/Binary: The digital input/output is the one that has a value representing one state or another.

Typical values are "on/off", alarm or normal, 0 or 1, high or low

5.1 Field Devices (Sensors) For BMS

AI - Analog Input

BI / DI – Binary / Digital Input

AO – Analog Output

BO / DO – Binary / Digital Output

5.2 Field Level Controllers:

• RCU (Room control Unit)

• DDC Controllers

• MIG – Controller (Plantroom)

5.3 Supervisory Level:

• NAE Controller

• ADS Software (UI)

• Field Sensors

Fig: 55.1 Showingg the locatio

Fig 5.2 B

on of all sen

BMS system

nsors and de

m Architectu

etector in a

ure

building.

74

75

LIST OF ALL THE COMMISSIONED SYSTEMS

Building Management System (BMS)

S.

No. Equipment Manufacturer Quantity Type

Input

Power

1 RCU Johnson controls 44 Controller 24 V AC

2 Occupancy Sensor Johnson controls 36 Sensor 12 V DC

3

Duct Temperature Sensor(All

Rooms) Johnson controls 46 Sensor NA

4

Immersion Temperature Sensor

(CHW & CDSW Temp.) Johnson controls 4 Sensor NA

5

Duct Temperature & RH

Sensor (TFA) Johnson controls 3 Sensor 15 V DC

6

Outside Air Temperature &

RH Sensor Johnson controls 1 Sensor 15 V DC

7

Air Differential Pressure

Switch for Run status (TFA) Johnson controls 1 Sensor NA

8

Air Differential Pressure

Switch for Filter status (TFA) Johnson controls 1 Sensor NA

9

Tank Level Sensor

(Plantroom) Veksler 6 Sensor NA

10

Cooling Tower Tank Level

Sensor (Terrace) Veksler 2 Sensor NA

11

Oil Tank Level Sensor

(Plantroom) Veksler 1 Sensor 24 V DC

12 DDC Panel

(A) General Johnson controls 3 Controller 24 V AC

(B) Expansion Panel MX50 Johnson controls 2 Controller 24 V AC

(C )Expansion Panel MX55 Johnson controls 1 Controller 24 V AC

(D) Expansion Panel MX54 Johnson controls 1 Controller 24 V AC

76

S. No. Equipment Manufacturer

Quantity Type

Input Power

1 RCU Johnson controls 44 Controller

24 V AC

2 Occupancy Sensor Johnson controls 36 Sensor

12 V DC

3 Duct Temperature Sensor(All Rooms) Johnson controls 46 Sensor NA

4 Immersion Temperature Sensor (CHW & CDSW Temp.)

Johnson controls 4 Sensor NA

5 Duct Temperature & RH Sensor (TFA) Johnson controls 3 Sensor

15 V DC

6 Outside Air Temperature & RH Sensor Johnson controls 1 Sensor

15 V DC

7 Air Differential Pressure Switch for Run status (TFA)


8 Air Differential Pressure Switch for Filter status (TFA)


9 Tank Level Sensor (Plantroom) Veksler 6 Sensor NA

10 Cooling Tower Tank Level Sensor (Terrace) Veksler 2 Sensor NA

11 Oil Tank Level Sensor (Plantroom) Veksler 1 Sensor 24 V DC

12 DDC Panel

(A) General Johnson controls 3 Controller

24 V AC

(B) Expansion Panel MX50 Johnson controls 2 Controller

24 V AC

(C )Expansion Panel MX55 Johnson controls 1 Controller

24 V AC

(D) Expansion Panel MX54 Johnson controls 1 Controller

24 V AC

(E) Expansion Panel MX25 Johnson controls 1 Controller

24 V AC

13 MIG – Controller (Plantroom) Johnson 1 Controller 24 V

(E) Expansion Panel MX25 Johnson controls 1 Controller 24 V AC

13 MIG – Controller (Plantroom) Johnson controls 1 Controller 24 V AC

14

NAE – Supervisory Controller

(BMS Room) Johnson controls 1 Controller 24 V AC

15

Chilled Water Flow Meter

Sensor (Plantroom) Johnson controls 1 Controller 25 V AC

77

controls AC

14 NAE – Supervisory Controller (BMS Room)

Johnson controls 1 Controller

24 V AC

15 Chilled Water Flow Meter Sensor (Plantroom) Johnson controls 1 Controller

25 V AC

5.4 Fire Alarm System (FAS)

S.

No. Equipment Manufacturer Quantity Type Input Power

1

Fire Alarm Panel (BMS

Room) Johnson controls 1 Controller 240 V AC

2

Fire Detector –

Multicriteria (Rooms) Johnson controls 74

Detector

Addressable 15- 32 V DC

3

Fire Detector – Photo

electric (Rooms) Johnson controls 46

Detector

Addressable 15- 32 V DC

4

Control Module (Lobby

area) Johnson controls 10 Module addressable 15- 32 V DC

5

Monitor Module (Flow

switch) Johnson controls 8 Module addressable 15- 32 V DC

6

Hooter with Horn/Strobe

(Lobby area) Johnson controls 10 Hooter 24 V DC

7

Manual Call Point (Lobby

area) Johnson controls 9 MCP Addressable 24 V DC

5.5 Public Address System (PAS) S.

No. Equipment Manufacturer Quantity Type

Input

Power

78

1 Speakers (All Rooms) Noti fire 44 Ceiling Speaker 24 V AC

2

DVC Digital Voice

Command (Fire Panel, BMS

Room) Johnson controls 1 Controller 24 V DC

3

DAA Digital Audio Amplifier

(Fire Panel, BMS Room) Johnson controls 2 Amplifier 240 V AC

79

CHAPTER 6

ELECTRICAL

Fig: Electrical Power Flow

6.1 ELECTRICAL SYSTEM

6.1.1 Source of Power Supply

(a.) In AES site the source of electrical power supply is Gas Generator.

(b.) Standby Diesel Generator

Rating of Diesel Generator

Electrical output: 1010 KVA

(c.) NDMC supply 440 volts

Source of power

Supply /

Main LT Panel

HVAC Panel Electrical

Floor Panels

Plumbing Panel Lift Panel

Capacitor Panel

80

6.1.1.1 GAS GENERATOR

Fig: 6.1 TCG 2016 V 16 GAS GEN SET

Fig: 6.2 Piping Of GG

81

Fig: 6.3 Power Panel, Cabling and Bus Duct

Gas Generator

Rating of Gas Generator

Genset Data Load

100% 75% 50% Unit

Calculated Fuel Gas Flow Per Unit 179 138 96 Nm3/h

Electrical Output 774 581 385 KW

S. No. Description Particulars

Gas Engine

1 Manufacturer Deutz

2 Type Natural Gas Based

3 Capacity 774 KW

82

4 Gas pressure Input 3.0 bar

5 Lube Oil Quantity 600 ltr.

6 Coolant Type Wt Supra

Alternator

1 Manufacturer Marellimotori

2 Type 3 Phase alternator

3 KVA 1300

4 PF 0.8

5 Amp 1820 A

6 RPM 1500

7 Exciting Voltage 22 V DC

8 Exciting Current 6.5 A

9 Ambt Temp. 40.0 Cent.

Pump Detail using in Gas Generator Plant

S.No. Description Make HP KW Amp

Volts

O/L

Realy

1 Blower N/A 18.50 415

2 Pump N/A 12.50 9.30 16.80 415 15.00

3 Condenser water pump-1 Bell& Gossett 10.50 7.50 14.30 415 16.00

4 Condenser water pump-2 Bell& Gossett 10.50 7.50 14.30 415 16.00

5 Cooling Tower Fan N/A 7.30 5.50 17.00 415 11.00

6 HT Pump LOWARA 12.30 9.20 16.8-9.69 415 14.50

7 Hot Water sec. pump LOWARA 7.30 5.50 10.1-5.85 415 10.00

8 LT Pump LOWARA 4.50 3.00 11.1-6.38 415 4.50

9 D M Water KRILOSKER NA 0.75 2.10 415 2.10

10 Lube Oil Transfer ABB 0.50 0.37 1.10 415 0.90

11 Pre Lubrication Pump Robert Birkenbeul NA 0.37 2-3.3 415 2.65

83

6.1.2 ELECTRICAL INTERNAL WIRING

• First of all our priority should be given for completing layout and distribution within the

building.

• It is necessary to freeze all electrical single line diagrams.

• Then carryout the laying of cable trays, cabling, conduiting, wiring and fixing of points.

• Checking is required simultaneously to get the quality of job.

• All necessary formalities should be taken to complete well in advance with proper

documentation.

6.1.3 SEQUENCE OF WORK

• Laying cable trays (power & data) with proper support.

• Laying of cable(power & data)

• Laying copper strip

• Cables should be tie up

• Proper ferruling

• Light fixing with proper support

• Fixing of points

• Termination

6.1.4 MATERIALS USED

• Copper plate for earth grid

• Anchor fastener

• Threaded rod

• Nut bolt

• Cable tray

• Data cable

• 110v power cable

• 220v power cable

• Tie up thread

• Copper strip

• Numbering & Marking

• Distribution box

• Floor panels

84

6.1.5. MAIN LT PANEL

Fig: 6.4 Main LT Panel

3.1.2.1 Main LT panel is fed by 1600 Ampere BUS DUCT from GG. Main LT panel

feed all other panels through different size of cables according to their current

ratings which is shown in Fig

3.1.2.2 Bus duct is connected GG and Main LT panel through flexible connection.

3.1.2.3 Incoming & outgoing from panel is provided with thermal relay for overload

Short circuit and earth fault protection.(Manufactured: L&T, Areba)

3.1.2.4 Floor panel is fed by 1000 Amp. Bus duct.

85

6.1.6. EARTHING

In AES site we provide 8 earth pit and these all connected with 2 more earth pit which are in existing

building in circular connection.

Earth resistance should be at 0 to 4 ohm for providing proper protection.

4.1.7 Important Points to be remember

MCB rating should always be 1.5 times or more than actual load.

Relays should be set at 10 % access of full load current. e.g. If full load current of motor is 10 A

than relay should be fixed at 11 A.

4 core cables is used where we required neutral. As if we want to feed any panel than we should

used 4 core cable.

3 core cables used in delta start motors.

Cable size is decided by using electrical handbook. Firstly we calculate the total amp. load than

we see in electrical handbook and take sufficiently oversized cable.

Load should be equally distributed on each phase.

Earthing should be properly done.

In star/ delta connection of motor 2 runs are coming from panel.

In DOL starting motor are fed by single cable.

86

CHAPTER 7

FIRE FIGHTING In AES site Fire fighting system installed in two parts. Each part covers half of building. There are two

way to protect the building from fire.

(a.) Sprinkler system

(b.) Hydrant system

(a.) Sprinkler system

Equipments used in Sprinkler system

Mild steel pipe

Sprinkler heads

Fig: 7.1 Sprinkler heads

Flow switches

Sprinkler alarm

Valves

The sprinkler system consist of 2 nos. of riser connected to 2 nos. of sprinkler alarm valves incoming of

which is from pump room delivery line and headers are tapped off in each floor.

The header at each floor will be provided with branches for proper distribution of water. Sprinkler bulbs

are also located to see the level of water.

(b.) Hydrant system

In the case of any fire hazard, hydrant valves installed inside and /or outside the building will be

operated thereby resulting a fall in pressure in the system.

87

Equipments used in Hydrant system

Mild steel pipe

Flanges

Elbow

Fire hose reel

Fire Hydrant

Hose Pipe

Fig: 7.2 Insight arrangement of fire door

1. RRL Hose: S. No DESCRIPTION

1. MANUFACTURER Newage

2 TYPE Reinforced Rubber

3 BRUST PRESSURE 30 Kg / sqcm

88

4 WORKING PRESSURE 14 Kg / sqcm

5 Size of Coupling 63 mm x 63 mm

6 End Connection

Pair of male / Female

Instantaneous coupling

IS-903

7 Length 15 mtr

8 Inside Diameter 63 mm

2. GM HYDRANT VALVE SINGLE:

DESCRIPTION VALUES

A. GENERAL

1 Manufacturer Newage

2 Type Screw Type BSP

3 Size 80 mm NB

4 Out Let 63 mm Instantaneous coupling with pull

out spring lock type as per IS 5290 type-A

5 Blank Cap Rubber IS : 937

6 Hydrostatic Pressure Test 20 Kg/sqcm

8. Motor Full load Efficiency

9. Motor No

3. 20 MM RUBBER HOSE:

DESCRIPTION DETAIL

1. Type Wall Mounting Swingly(180 C)

2. Manufacturer Padmini

4. Specification As per IS-444 for Rubber Hoses

5. Size 20mm dia x 36.5m long

6 Working Pressure 10kg/cm2

89

4. Preesure Gauge

1. Type Head Bourden Type Pressure Vaccum

Compound Gauge

2. Manufacturer H Guru

3. Accuracy +-1% of FSD

4. Size of dia 100mm

5. Range 0-15kg/cm2

6. Connection size 3/8 inch BSP

7. Burdon Materials SS-316

8. Test Pressure 25kg/cm2

4. CONTROL VALVE

DESCRIPTION VALUES

1. Manufacturer H.D.Fire

2. Approval UL Listed

3. Size 100-80NB

4. Working Pressure 12.3kg/cm2

5. Hydro Testing Pressure 25kg/cm2

6. Rubber Clamp SS-304

7. Seat & Cover Bronze IS 318 LTB-2

8.

Trim Type

Variable Pressures Trim With

Rotard Chamber & Sprinkler

Alarm

9. Housing & Cover Cast Iron

5. G.M. Ball Valve

DESCRIPTION VALUES

1. Manufacturer Zoloto

90

2. Standard IS-778/1980

3. End Type Threded

4. Tested Pressure 25 Bar

5. Body Forged Brass

6. Flow Switch

1. Manufacturer System Sensor

2. Type Vane Type

3. Model WFD Series

4. Size 80/65 mm

5. Operating Range 0-49 ºc

6. Approvel UL / FM

7. Branch Pipe

8. Hose Reel Drum.

S.No. Description Detail

1 Manufacturer Newage

2 Type Wall Mounting swinging Type

3 Drum Mild Steel

1. Manufacturer Newage

2. Nozzle IS-318 LTB-2

3. Washer Rubber to IS-937 Type B

4. Size 30 mm

5. Nozzle Dia 20 mm

6. Hydro Static Pressure Test 21kg/cm2

91

4 Size 230 mm wide x 550 mm dia

5 Hose Size 20 mm dia x 36.5 mtr long

9. 10. 5 Kg ABC Type Fire Extinguisher.


1 Manufacturer Mini Max

2 Type ABC Type dry Chemical powder

3 Capacity 5 Kg

4 Operation Vertical

5 Test Pressure 30 bar

6 Charge Pressure 14 bar

7 Jet Range 4 to 5 mtrs

8 Discharge time 15 to 25 second

10. Butterfly Valve:


1 Manufacturer Intervalve

2 Type Central disc design butterfly valve

with a single pcs rubber boddy

3 Actuator Hand lever

4 Size 50 NB to 150 NB

5 Pressure Rating PN – 1.6

6 Hydro Static Pressure 14 Kg/sqcm

11. Sprinkler:


1 Manufacturer Tyco

92

2 Series TY-B

3 Model TY3251 pendent type

4 Bulb Operating Temparature 68dec C

5 End Connection 1/2” NPT

6 Color of Bulb Liquid Red

7 Frame Bronze

8 Bulb Glass

9 Deflector Copper

10 Approval UL-Listed

12. SS-304 Flexible Dropper:


1 Manufacturer Easy Flax

2 Standered UL-Listed

3 Model & Size EFB – 236 & 914mm

4 Connection To Branch Line (inlet) 25 mm NPT

male threaded to sprinkler head

(outlet) 15 mm NPT female threaded

5 Working Pressure 200 PSI / 1375 KPA

6 Test Pressure 1000 psi / 6875 kpa

7 Temperature Rating 300 deg F (149 deg C)

13. MS Pipe 25 NB to 150NB:


1 Make Jindal Hissar

2 Specification IS-1239 Heavy Class C ERW black plain ends

3 Hydro Test 16 Kg/sqcm

4 Spark Test Rapping and coating shall be tested with spark test / holiday test

aes report 09

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