Modification & Expansion of Indian Institute of Technology, Delhi
Hauz Khas, New Delhi Pre-Feasibility Report
Indian Institute of Technology, Delhi 61
Pre- Feasibility Report
INTRODUCTION
Indian Institute of Technology-Delhi is one of the seven IT Institutes created as centres of
excellence for higher training, research and development in science, engineering and technology
in India, the others being at Kanpur, Kharagpur, Madras, Bombay, Guwahati and Roorkee.
Established as College of Engineering in 1961, the Institute was later declared an Institution of
National Importance under the "Institutes of Technology (Amendment) Act, 1963" and was
renamed ‘Indian Institute of Technology (IIT) - Delhi’. It was then accorded the status of a
deemed university with powers to decide its own academic policy, to conduct its own
examinations, and to award its own degrees.
The total area of IIT, Delhi campus measures 312.5 Acre (12, 64,727 sqm).
The project was earlier granted Environment Clearance by SEIAA, Delhi vide letter no.
42/DPCC/ SEIAA-SEAC/10/1429-33 dated 11.11.2010 for addition of three blocks viz.,
Professors’ Apartments, Mini Academic Block & New Boys’ Hostel with built-up area =
1,61,919 m2. Post addition of these three blocks, the total built-up area of campus became 6,
42,560 sqm.
IIT, Delhi proposes modification and expansion of the campus with addition of nine new blocks
in the campus viz.
Nalanda Hostel,
GH Keswani Research Centre,
Boys Hostel ‘E’,
Indoor Sports Complex,
Activity Centre,
Research and Innovation Park,
Assistant Professor’s Apartment,
New Girls Hostel,
Shopping Complex
There is also some demolition and redevelopment involved in Nalanda Hostel, Boys Hostel ‘E’,
New Girls Hostel and Shopping Complex.
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As a result of modification and expansion (i.e. addition of above-said nine blocks), the built-up
area of campus will increase by 1,35,330.07 sqm. Hence, the total (existing + modification and
expansion) built-up area is estimated to be 7,70,563.07 sqm.
SITE LOCATION AND CONNECTIVITY
The site is located at Hauz Khas, Delhi. The geographical coordinates of project site are:
28°33'1.94"N, 77°11'1.79"E
28°32'39.71"N, 77°10'42.72"E
28°32'29.76"N, 77°11'0.16"E
28°32'22.03"N, 77°11'55.60"E
The nearest metro station is Hauz Khas Metro Station at a distance of 1.64 km from the site.
The nearest railway station is Sarojini Nagar Railway Station at an approx. distance of 3.5 km.
Indira Gandhi International Airport is situated around 8.5 km from the project.
NH-8 Lies approx. 5.0 km away from project site.
Location Map is shown below in figure 1:
Modification & Expansion of Indian Institute of Technology, Delhi
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Figure 1: Location Map
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AREA DETAIL
The total area of campus measures approx. 12,64,727 sqm (312 Acre). Detailed area statement is given below in Table 1 (a) and (b):
Table 1 (a): Comparative Area Statement
S. No. PARTICULARS EXISTING
AREA (Sqm)
TO BE
DEMOLISHED
AREA
(Sqm)
EXPANSION
AREA
(Sqm)
TOTAL
(EXISTING - TO BE
DEMOLISHED +
EXPANSION) (Sqm)
1. Total plot (site) area 12,64,727
(312.5 Acre)
2. Net plot area (excluding roads
widening, handed over to DMRC
& open spaces)
10,27,440 (253.88 Acre)
3. Permissible Ground Coverage
@30%
3,08,232
4. Proposed Ground Coverage 1,97,423 5376 20,998.035 2,13,045.035
5. Permissible FAR @120% 12,40,881.6
6. Proposed FAR 6,18,879 7167 1,13,481.11 7,25,193.11
7. Non-FAR 23,681 160 21,886.501 45,407.50
8. Built-up area 6,42,560 7327 1,35,330.07 7,70,563.07
9. Green area 4,93,609 N.A. 96,307 5,89,916
10
.
Maximum height of the building
(m)
36 N.A. 26 26
Modification & Expansion of Indian Institute of Technology, Delhi
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Table 1 (b): Area Statement for Proposed New Building Blocks (Expansion)
S. No. Proposed New Building
Blocks
Ground Coverage
(Sqm)
F.A.R. (Sqm) Non-F.A.R.
(Sqm)
Built-up area
(Sqm)
1. Nalanda Hostel 1886.78 15,094.24 1234.80 16,329.04
2. GH Keswani Research Centre 1769.66 9100.07 956.73 10,056.80
3. Boys Hostel ‘E’ 3849.65 24,035.21 308.16 24,343.37
4. Activity Centre 1734.335 7542.86 578.51 8121.37
5. Sports Complex 2010.65 3510.71 58.26 3568.97
6. Research and Innovation Park 3376.48 19,066.06 13,307.59 32,373.65
7. New Girls Hostel 2321.78 11,631.78 272.25 11,904.03
8. Assistant Professor’s
Apartment
2987 20,625.90 4973.02 25,598.92
9. Shopping Complex 1061.7 2874.28 159.64 3033.92
TOTAL 20,998.035 1,13,481.11 21,848.96 1,35,330.07
POPULATION DETAIL
The total (existing + modification/expansion) population of the project is estimated to be
27,162 persons including fixed and floating. Population break-up is given below in Table 2:
Table 2: Population Break-up
S.
No.
Particulars Existing
population
Population of
to be
demolished
buildings
Population of
expansion/new
buildings
Total
Population
(Existing – To
be Demolished
+ Expansion)
1. Residential population
(housing facilities):
Faculty/Staff
Hostellers (Boys &
Girls)
12,980
4800
Nil
-350
1140
2894
14,120
7344
2. Floating population
(academic and ancillary
facilities):
Staff/Students
Maintenance &
Security Staff
Visitors
1850
200
Nil
-25
-50
2672
335
716
4522
310
866
GRAND TOTAL
(1+2)
19,830 -425 7757 27,162
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WATER & WASTE WATER
Total (existing + modification/expansion) water requirement for the project will be approx.
5416 KLD. The primary source of water will be Municipal Water Supply System from DJB.
The details of water demand and waste water generation are given below in Table 3 (a), 3 (b)
& 4 respectively:
Table 3 (a): Calculation for Daily Water Demand (Existing)
S. No. Description Occupancy Per Capita
Water
Demand (lpcd)
Total Water
Demand (KLD)
A. DOMESTIC WATER
1.) Residential population (housing facilities):
Faculty/Staff 12,980 135 1752.3
Hostellers (Boys &
Girls)
4800 135 648
2.) Floating population (academic and ancillary facilities):
Staff/Students 1850 45 83.25
Visitors 200 15 3
Total Domestic Water Requirement (1+2) 2486.55 say 2487
KLD
B. HORTICULTURE
4,93,609 m2
3 l/sqm 1479
C. HVAC COOLING 320
D. MISCELLANEOUS
(Fountains, Ponds, etc.)
28
TOTAL WATER REQUIREMENT (A+B+C+D) 4314 KLD
Table 3 (b): Calculation for Daily Water Demand (Post Modification & Expansion)
S. No. Description Occupancy Per Capita
Water
Demand (lpcd)
Total Water
Demand
(KLD)
A. DOMESTIC WATER
1.) Residential population (housing facilities):
Faculty/Staff 14,120 135 1906
Hostellers (Boys &
Girls)
7344 135 991
2.) Floating population (academic and ancillary facilities):
Staff/Students 4832 45 217
Visitors 866 15 13
Total Domestic Water Requirement (1+2) 3127
B. HORTICULTURE 3 l/sqm 1770
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5,89,916 m2
C. HVAC COOLING* 491
D. MISCELLANEOUS
(Fountains, Ponds, etc.)
28
TOTAL WATER REQUIREMENT (A+B+C+D) 5416 KLD *Assuming 7.5 ltr/tonne/hr and 8 hrs operation/day
Table 4 (a): Waste Water Calculation (Existing)
Table 4 (b): Waste Water Calculation (Post Modification & Expansion)
Water balance diagrams are presented below in Figure 2 (a) and (b):
DOMESTIC WATER 2487 KLD
1.) For Residential population: 2400 KLD
Potable (70% of domestic) 1680 KLD
Flushing (30% of domestic) 720 KLD
2..) For Floating population: 87 KLD
Potable (30% of domestic) 26 KLD
Flushing (70% of domestic) 61 KLD
Total Potable water 1680 + 26 = 1706 KLD
Total Flushing water 720 + 61 = 781 KLD
Waste Water Generated @80% (potable + flushing) 1365 + 781 = 1990 KLD
STP Capacity 2030 KL (modular)
DOMESTIC WATER 3127 KLD
1.) For Residential population: 2897 KLD
Potable (70% of domestic) 2028 KLD
Flushing (30% of domestic) 869 KLD
2..) For Floating population: 230 KLD
Potable (30% of domestic) 69 KLD
Flushing (70% of domestic) 161 KLD
Total Potable water 2097 KLD
Total Flushing water 1030 KLD
Waste Water Generated @80% (potable + flushing) 2502 KLD
STP Capacity 3000 KL (modular)
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Figure 2 (a): Water Balance Diagram (Existing)
Figure 2 (b): Water Balance Diagram (Post modification & expansion)
Treated effluent
POTABLE WATER
(1706 KLD)
WASTE WATER = 1989 KLD
STP CAPACITY 2030 KL
(modular)
HORTICULTURE
(1479 KLD)
@ 80%
1790 + 37 = 1827 KLD
FLUSHINGWATER
(781 KLD)
@ 80%
1479 KLD
Waste Water
HVAC COOLING
(320 KLD)
320 KLD
FRESH WATER
(2487 KLD)
Fresh Water
MISCELLANEOUS
(Fountains, Ponds, etc.)
(28 KLD)
28 KLD
ETP (Labs)
50 KL
1790 KLD @90%
37 KLD
@90%
Treated effluent
POTABLE WATER
(2097KLD)
WASTE WATER = 2502 KLD
STP CAPACITY 3000 KL
(modular)
HORTICULTURE
(1770 KLD)
@ 80%
2252 + 37 = 2289 KLD
FLUSHINGWATER
(1030 KLD)
@ 80%
1770 KLD
Waste Water
HVAC COOLING
(491 KLD)
491 KLD
FRESH WATER
(3127 KLD)
Fresh Water
MISCELLANEOUS
(Fountains, Ponds, etc.)
(28 KLD)
28 KLD
ETP (Labs)
50 KL
37 KLD
@90%
2252 KLD @90%
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The existing total water requirement for the project is 4314 KLD out of which domestic/fresh
water requirement is 2487 KLD.
IIT Delhi campus has several laboratories and the effluent (acids, alkalis, solvents, etc.)
generated from these is being treated in an onsite ETP of 50 KL capacity.
The existing waste water generation from the project is 1989 KLD which is being treated in
onsite STP (s) of combined capacity 2030 KL. The treated effluent (1827 KLD) from STP &
ETP is being reused for horticulture, HVAC cooling, fountains, ponds, etc.
Post modification and expansion of the project, it is expected that total water requirement
will increase to 5416 KLD and approx. 2502 KLD of waste water will be generated from the
project which will be treated in onsite STP (s) of approx. 3000 KL combined capacity
(existing + expansion).
The treated effluent (2289 KLD) from STP & ETP will be reused for horticulture, HVAC
cooling, fountains, ponds, etc.
EFFLUENT TREATMENT SCHEME FOR LABORATORIES:
Following is the list of laboratories in IIT Delhi campus for which there is an onsite ETP of
50 KL capacity:
Table 5: List of Laboratories
S. No. Name of Laboratory Name of Department
1. Animal Cell Culture Biochemical Engg & Biotechnology
2. Biochem Engineering Biochemical Engg & Biotechnology
3. Biochem Research Biochemical Engg & Biotechnology
4. Bioseparation Biochemical Engg & Biotechnology
5. Enzyme Engg. Biochemical Engg & Biotechnology
6. M.Tech. Biochemical Engg & Biotechnology
7. Mutation Biochemical Engg & Biotechnology
8. Pharama Biotech Biochemical Engg & Biotechnology
9. Plant Cell Culture Biochemical Engg & Biotechnology
10. R N A Biochemical Engg & Biotechnology
11. Waste Treatment Biochemical Engg & Biotechnology
12. Adsorption Research Chemical Engineering
13. Biomass Block III Chemical Engineering
14. FPM & Membrene Sep. Chemical Engineering
15. Interfacial Electro / Fuel Chemical Engineering
16. Interfacial & Nano Sc. Chemical Engineering
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17. Multiphase Reactor Eng. Chemical Engineering
18. Pilot Plant I Chemical Engineering
19. Pilot Plant II Chemical Engineering
20. Pollution Control (II/01) Chemical Engineering
21. Postgraduate Research Chemical Engineering
22. Powder Technology Chemical Engineering
23. Reaction Engg. Research I Chemical Engineering
24. Reaction Engg. Research II Chemical Engineering
25. Undergraduate Chemical Engineering
26. Analytical Res. Chemistry
27. Bio Chemistry Research Chemistry
28. Bio in-organic Research Chemistry
29. Bio organic Research Chemistry
30. Enzyme & Micro Bio. Cy. Chemistry
31. Inorganic Analytical Research Chemistry
32. Materials Chemistry Research Chemistry
33. Organic Chemistry Chemistry
34. Organic Chemistry Research Chemistry
35. Organic Research (VI/232) Chemistry
36. Organic Research (VI/343) Chemistry
37. Organic Synthesis Chemistry
38. Organomet. & Analytical Chemistry
39. Organometallic Research Chemistry
40. Organosilicon Chemistry
41. Environment Civil Engineering
42. Fuel Pollution Mechanical Engineering
43. I C Engine Mechanical Engineering
44. Materials & Systems Physics
45. Spray Pyrolysis Physics
46. Thin Film (MS-401) Physics
47. Chemical Research Eng. Textile Technology
48. Eco Textile Technology
49. Fabric Manufacturing Textile Technology
50. Fibre Production Textile Technology
51. Fibre Science Textile Technology
52. Melt Spinning Textile Technology
53. Textile Chemistry Textile Technology
54. Textile Technology Textile Technology
55. Air Pollution Centre for Atmospheric Sciences
56. Vehicular Pollution Monitoring Centre for Atmospheric Sciences
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57. Drug Delivery I Centre for Biomedical Engineering
58. Coal Research Centre for Energy Studies
59. Environmental Bio-Technology Centre for Energy Studies
60. Fuel Research Centre for Energy Studies
61. Solar Distillation Centre for Energy Studies
62. I C P ITMMEC
63. Lubricant (V/165) ITMMEC
64. Polymer Processing ITMMEC
65. Polymer Characterization Centre for Polymer Science & Engg.
66. Polymer Chemistry Centre for Polymer Science & Engg.
67. Polymer Processing Centre for Polymer Science & Engg.
68. Applied Mirco-Biology Centre for Rural Development & Tech,
69. Chemistry Centre for Rural Development & Tech,
70. Extraction Centre for Rural Development & Tech,
71. Food Quality Safety Centre for Rural Development & Tech,
The ETP Scheme is shown below in Figure 3:
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Figure 3: ETP Scheme
Solids removal:
Most solids can be removed using simple sedimentation techniques with the solids
recovered as slurry or sludge. Very fine solids and solids with densities close to one
pose special problems. In such case filtration or ultra-filtration may be required.
Alternatively, flocculation may be used using alum salts or the addition of poly-
electrolytes
Acids and alkalis:
Acids and alkalis can usually be neutralized under controlled conditions. Neutralization
frequently produces a precipitate that will require treatment as a solid residue that may
also be toxic. In some cases, gasses may be evolved requiring treatment for the gas
stream. Some other forms of treatment are usually required following neutralization.
Waste streams rich in hardness ions as from de-ionization processes can readily loose
the hardness ions in a build-up of precipitated calcium and magnesium salts. This
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precipitation process can cause severe furring of pipes and can, in extreme cases,
because the blockage of disposal pipe.
Fine Screening:
The use of fine screens for the purpose of removing from the sewage a part of the
suspended solids is a recognized method of sewage treatment.
Advance Oxidation Process:
It is proposed to use Fenton’s reagent (H2O2 + Fe SO4) as advance oxidation process to
oxidise the toxic organics present in the laboratory effluent.
SEWAGE TREATMENT SCHEME
Sewerage System:
The sewage network shall collect the sewage from new buildings which will flow by
gravity to the existing Sewage Treatment Plant.
Following are the benefits of Sewage Treatment Plant:
• Reduced net daily water requirements from tube wells, source for Horticultural
purposes by utilization of the treated waste water. This shall consequently lead to
a lower withdrawal from the underground aquifer water sources.
• Reduced dependence on the public utilities for water supply and sewerage systems.
• Sludge generated from the Sewage Treatment Plant shall be rich in organic
content and an excellent fertilizer for horticultural purposes.
A brief description of the sewage treatment technology is given below:
Membrane Bio – Reactor is among the latest technologies in bio-chemical treatment.
It is designed to produce high quality treated water from wastewater with highest
possible contaminant reduction without using any chemicals. The characteristics of
the MBR process is the use of revolutionary submerged micro and ultra-filtration
membranes in the biological process water tank, to produce high quality permeate
from domestic sewage, primary and secondary wastewater, etc. The submerged
membranes used in the biological process water tank totally removes suspended
sludge from the activated sludge liquid and long term stable MBR operation is
achieved with high permeate flow rates.
Advantages of MBR:
• Low energy consumption (0.30 kwh/m3) for filtration.
• Upto 99.999% removal of total coliform
• Compact, requires ½ to 1/3 spaces over a conventional system.
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Figure 4: STP Scheme
RAINWATER HARVESTING PLAN
IIT Campus has an existing storm water drainage system and 105 RWH pits for ground water
recharge.
Additionally, as per the Hon’ble Delhi High Court Order, run-off from campus is being
directed to the internal onsite drains which ultimately join Deer Park, Safdarjang Enclave.
For the proposed expansion/new buildings, 20 RWH pits are proposed to collect the storm
water. The rain water harvesting system will consist of seepage/percolation pits with bore
holes in the middle of the pit.(8” dia) perforated UPVC pipe will be lowered in the middle of
the boreholes and the pit will be filled with gravel / pebbles in three layers, each consists of
boulders(8” dia), gravel (1”-2” dia) & coarse sand. This system is proposed to sustain ground
water table by recharging the aquifer. The mouth of the UPVC pipe shall be protected to
avoid silt getting into the same.
Design specifications of the rain water harvesting plan for new buildings are as follows:
• The roof will have smooth, hard and dense surface which is less likely to be damaged
allowing release of material into the water. Roof painting has been avoided since most
paints contain toxic substances and may peel off.
• All gutter ends will be fitted with a wire mesh screen and a first flush device would be
installed. Most of the debris carried by the water from the rooftop like leaves, plastic
bags and paper pieces will get arrested by the mesh at the terrace outlet and to prevent
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contamination by ensuring that the runoff from the first 10-20 minutes of rainfall is
flushed off.
Figure 5: Rain Water Harvesting Pit Design
Run-off generated from new buildings:
Roof top area = Ground coverage = 20,998.035 sqm
Green area = 96,307 sqm
Peak hourly run-off from roof top = 20,998.035 x 0.8 x 0.04 = 672 m3/hr
Peak hourly run-off from green area = 96,3207 x 0.1 x 0.04 = 3853 m3/hr
Total peak hourly run-off from new buildings = 4525 m3/hr
Considering 15 minutes retention time, volume of storm water will become = 1131 m3
Volume of single RWH pit = 𝜋𝑟2h = 3.14 x 1.5 x 1.5 x 5 = 35.32 m3
No. of RWH pits required = 1131/35.32 = 35.02
36 no. of pits are proposed for new buildings for artificial ground water recharge.
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SOLID WASTE
The total (existing + modification/expansion) solid waste generated from the project will
be mainly domestic waste and estimated quantity of the same is approx. 12,099 kg/day (@
0.5 kg/capita/day for residential population, 0.25 kg/capita/day for staff/students and 0.15
kg/capita/day for visitors).
The solid waste generated from the existing buildings is approx. 7624 Kg/day.
The solid waste is being managed through an approved agency as per Solid Waste
Management Rules, 2016.
The e-waste generated from the complex is being recycled through an authorised e-waste
management agency.
Solid waste calculations are given below in Table 6:
Table 6: Calculation of Solid Waste (Post Modification and Expansion)
S. No. Description Occupancy Per Capita
Waste
Generation
(kg/c/d)
Total Waste
Generation
(kg/d)
1.) Residential population (housing facilities):
Faculty/Staff 14,120 0.5 7060
Hostellers (Boys &
Girls)
7344 0.5 3672
2.) Floating population (academic and ancillary facilities):
Staff/Students 4832 0.25 1208
Visitors 866 0.15 130
3.) Horticulture waste
5,89,916 m2
(145.77
acre)
0.2 kg/acre/d 29
TOTAL SOLID WASTE 12,099
kg/d
POWER REQUIREMENT AND BACK-UP
The existing power requirement for the project is 9000 KW being met from BSES. For power
back-up, total no. of 12 DG sets (1 x 750 kVA, 2 x 625 kVA, 5 x 500 kVA, 3 x 380 kVA &
x 62.5 kVA) are being used.
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Post modification and expansion, the total power requirement for the project will become
approx. 11,769 KW.
The power back-up details for new buildings are as follows:
Nalanda Hostel = DG sets 1 x 500 KVA + 1 x 250 kVA
GH Keswani Research Centre = 3 x 800 kVA
New Girls Hostel = 1 x 170 kVA
Asst. Professor’s Apartment = 2 x 750 kVA
Shopping Complex = 1 x 100 kVA
Boy’s Hostel ‘E’ = 2 x 380 kVA
Activity Centre = 1 x 500 kVA + 1 x 500 kVA
Sports Complex = 1 x 62.5 kVA
Research and Innovation Park = 6 x 750 kVA
It is envisaged that operation of DG sets shall be operational for 4 hours/day. DG sets would
be used only during power failure and will be based on low sulphur diesel. It is proposed to
operate the DG sets in parallel through synchronizing and load monitoring panel.
PARKING FACILITIES
As per IIT’s norms, students coming to the campus are not allowed to use cars. Adequate
parking space (902 ECS) exists for residential population of the hostels/housing population
within campus.
Use of bicycles & pedestrian walking is encouraged within the campus. Para-transit (Cycle
rickshaws and shuttle buses) operate in Campus for students and staff.
Adequate provision will be made for parking under the new buildings. The parking details for
expansion (new buildings) are given below:
Parking required for the new buildings (according to MoEFCC norms):
For Hostels & Faculty Housing @ 1 ECS per 100 Sqm of FAR = 474 ECS
For other buildings @ 1 ECS per 50 sqm of FAR = 842 ECS
Total parking required as per MoEFCC norms = 1316 ECS
Parking required for the new buildings (according to State bye laws):
New Girls Hostel =117 ECS
Nalanda Hostel = 301 ECS
Boys Hostel = 509 ECS
Assistant Professor’s Apartment = 417 ECS
GH Keswani Research Centre = 183 ECS
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Research and Innovation Park = 374 ECS
Activity Centre = 151 ECS
Sports Complex = 70 ECS
Shopping Complex = 58 ECS
Total parking required as per State bye laws = 2180 ECS
Parking Proposed for the new buildings:
New Girls Hostel = 228 ECS
Nalanda Hostel = 302 ECS
Boys Hostel = 1462 ECS
Assistant Professor’s Apartment = 214 ECS
GH Keswani Research Centre = 183 ECS
Research and Innovation Park = 382 ECS
Activity Centre = 2813 ECS
Sports Complex = 1462 ECS
Shopping Complex = 110 ECS
Total Parking proposed for the new buildings = 7157 ECS
Total (existing + expansion) parking for the project = 8057 ECS
GREEN AREA
Total (existing + modification/expansion) green area measures 5,89,916 m2
besides a zonal
green strip of
70,795 sqm inside the campus.
The width of green belt shall be at least 3 m and the no. of rows vary from 2-3 all around
project periphery.
Native plantation species shall be selected for development of green area according to
CPCB norms with a mix of deciduous and evergreen plants to maintain the seasonal
greenery inside the complex.
Existing trees will be retained to the maximum possible. Tree cutting permission and
compensatory tree plantation is in process for the trees proposed to be cut.
DETAILS OF CONSTRUCTION MATERIAL
List of building materials to be used at site is as follows:
• Coarse sand
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• Fine sand
• Stone aggregate
• Stone for masonry work
• Stone for under floor soling
• Cement
• Reinforcement steel
• Plywood & steel shuttering
• Pipe scaffolding (cup lock system)
• Bricks
• Crazy (white marble) in grey cement
• P.V.C. conduit
• Indo-Asian MCBs
• PVC overhead water tanks
• 2 1/2'’ thick red colour paver tiles
• ‘B’ class GI pipe (ISI marked)
• PVC waste water lines
• S.W. sewer line upto main sewer
• PVC rain water down take
• Stainless steel sink in kitchen
• 5mm thick plane glass
• 3mm thick ground glass in toilets
• Joinery hardware-ISI marked