Design a hostel complex to accommodate 1000 students

Indian Institute of Technology
Kharagpur
The Problem
The Problem
To design a hostel complex to accommodate 1000 students at
IIT Kharagpur. It should have / conform to the following :
 Dining block with covered access from all the blocks.
 Provision for Lifts for each block.
 Common Toilet & Bath blocks.
 Common rooms / TV viewing area.
 Facilities for Indoor games.
 Common facilities such as Park, Swimming Pool, Sports Courts & Grounds
 Maximum height limit of the building is 25 m at Kharagpur

Kharagpur
Contents
Planning
Structural
design
Water
supply
system
Sewerage
system
Road
Network
Cost
Estimation
CONTENTS

Planning of the Hostel Complex
Kharagpur
Back

Kharagpur
 Divided into 12 Blocks.
 8 double room blocks
 4 single room blocks.
 Single room blocks.
 Each consisting of 88 rooms.
 Dimensions 2.5X3.5
 Double room blocks.
 Each consisting of 48 rooms
 Dimensions 4x6
 Main building.
 Student activity center.
 Outdoor sports facilities
Hostel Complex(G+4)

Kharagpur
Outdoor Sports Facilities
 Two Standard size Volleyball Courts
 Two Standard size Basketball Courts
 Two Standard size Badminton Courts
 One Cricket ground.
 One Football ground.
 One Swimming Pool (18x30m) in SAC
Planning of the Hostel Complex – Sports Facilities

Kharagpur
STUDENT ACTIVITY CENTRE(25×50m)
 Ground floor: Swimming pool(30×18m).
 Ground floor height is 6m.
 Rest rooms and bathrooms are provided near reception.
 Changing rooms,Lockers,Store rooms are also provided.
 Area is provided for Water cleaner and Pumping machines.
 First floor : Restaurant
Planning of the Hostel Complex – Other Amenities

Kharagpur
 Second floor : Indoor games and 2 Music rooms.
 Music room dimensions :12×25m
 5 Standard size Table tennis tables.
 2 Standard size Snooker tables.
 1 Standard size Squash court.
 A meeting room(12×25m).
 One server room

Kharagpur
 Second floor : Indoor games and 2 Music
rooms.(contd…)
 2 Carom Boards,
 Facilities for other games like Chess, Scrabble, Cards etc.
 One server room

Kharagpur
 Third floor: Gym and Yoga room
 Gym:22×26m.
 Yoga:19×22m.
 Yoga place is left open as the best place to do
yoga in open air.
 Wash rooms are provided.

Kharagpur
 Other features of SAC
 2 staircases and 2 lifts are provided.
 Seating arrangement is provided in every floor
for the people who are tired of standing .
 Washrooms are provided in every floor as per
requirement.

Kharagpur
 Ground floor: Administrative office
 Security room.
 Hall office.
 Warden office.
 Visitors rooms.
 First floor : Common room.
 Meetings can be arranged for large no. of students.
MAIN BUILDING

 Group activities can be discussed.
 Seminars and workshops can be organized.
 Second floor: TV room or Common room
 TV
 Seating Capacity: 400

Kharagpur
 First floor : Common room.
 Meetings can be arranged for large no. of students.
 Group activities can be discussed.
 Seminars and workshops can be organized.
 Second floor: TV room or Common room
 HD Plasma TV
 Seating Capacity:
MAIN BUILDING

Kharagpur
MAIN BUILDING (Cont…)
 Third floor: Library
 Seating capacity:..
 Computerized check-in and check-out system.
 Fourth floor: Study room.
 Seating capacity:…
 Study tables and chairs are provided.
 Newspaper and Magazine Tables are provided.

 Other features of Main building.
 …..staircases and …. lifts are provided.
 Washrooms are provided in every floor as per requirement

Kharagpur
MAIN BUILDING (Cont…)
 Other features of Main building.
 1 staircases and 1 lift is provided for every block.
 Washrooms are provided in every floor as per requirement

Kharagpur
Other Facilities – Parking
 Parking Facilities for Bicycles
 Entire G-floor of all Double room blocks is allotted for parking.
 Parking Space will be numbered
For instance, A01 will be used for rooms A101, A201, A301, A401 &
A501; so on.
Parking Space will be separated by 25 cm high brick walls
Planning of the Hostel Complex – Other Facilities

Kharagpur
 Lighting is to be provided for the parking space during night time.
 Four Cycle sheds are provided for the entire complex with air
pump & other repair facilities.

Kharagpur
 Drinking Water
 A Water Coolers (with Aqua guards) is provided on each floor of
every block
 Fire Safety
 Fire Extinguisher provided for every block
 Emergency fire exits (steel staircase type) placed adjacent to some of
the room balconies
 Water Hose pipes placed on common staircases
Other Amenities

Kharagpur
 Janitorial Facilities
 A room is provided on every the ground floor of every block
 Trash cans are placed at appropriate places like near canteens or beside wash
rooms
 A large dust bin will be present at G floor from where trash can be collected &
dealt with appropriately
 Announcement System
 Speakers provided on each floor of every block for common announcements
 Announcements can be made from main security booth, hall office and
Warden’s office.
Other Amenities

Kharagpur
 Utilities
 A server room is provided in the Students activity corner
 Lights are provided in every corridor
 Lifts
 A lift is provided for every block
 2 lifts are provided for the SAC
 2 lifts are provided in the main block
 Laundry Room
 Pay-n-use Laundry Room
 Present on every floor of Block C
Other Amenities

Kharagpur
 Internet Connection
 Both wired and wireless facilities for Internet
 Battery Powered during mains off
 Fiber optic cables to be used throughout for high speed
Other Amenities

Other Amenities (Special)
 Solar Power system
Kharagpur
 Automatic controlled solar plates at every terrace
 Street lighting also included
 Secondary electric power system
 Water treatment Plant
 2 Nos Primary treatment plant
 Secondary treatment plant if necessary

Kharagpur
Other Amenities (Special)
 Rain Water Harvesting
 Terrace will have no student access
 Rain water collected and transferred to Underground water tank
 Water recycled using treatment plant
Basic Medication
 Basic medical facilities and first aid facilities are provided
 Medical practitioner 24 hrs.

Kharagpur
 Two messes are provided.
 Seating capacity of each mess:500
 LCD TVs for entertainment.
 Automatic roti making machines.
 External gas station.
Planning of the Hostel Complex – Mess
Mess

Kharagpur
Lift
Load Car Inside
Person - 26 A – 1,600
Weight – 1,768 kg B – 2,400
Lift Well Enterance
C – 2,400 E – 1,200
D – 3,000

Kharagpur
Detail of Lift

Structural Design of the Complex
Kharagpur
Structural Design
Back

Kharagpur
Load Parameters (As per IS 1893)
Dead Load
Slab (150 mm thick) 3.0 kN/m2
Floor Finish 1.0 kN/m2
Brick Load (at floor) 4.0 kN/m2
Brick Load (at terrace) 2.0 kN/m2
Water Proofing 2.0 kN/m2
Terrance Finish 1.0 kN/m2
Live Load
Live load 4.0 kN/m2

Kharagpur
Load Parameters (As per IS 1893)
Earthquake Load
As per Code IS 1893 - 2002
Zone Kharagpur (III) – 0.16
Building RCC
Soil Medium
Wind Load :
Wind Speed 30 - 40 km/hr
Exposure 0.3

Kharagpur
Load Combination That have been tested
Load Case Descrption
1 1.5 (DL + LL)
2 1.2 (DL + LL + WL)
3 1.2 (DL + LL + EQ)
4 0.9 DL + 1.5 EQ
5 0.9 DL + 1.5 WL

Kharagpur
Materials
Concrete
Fck 25 N/mm2
Density 25 kN/m3
Steel
Fy Fe 415
Quality HYSD
Bricks
Size 228 x 107 x 69 mm
Density 20 kN/m3

Kharagpur
 Columns (500 x 500 mm)
 Beams (300 x 400 mm)
 Slab (150 mm thick)
 Staircase
 Foundation
Design of

Kharagpur
Design of Columns (Staad : Analysis)

Kharagpur
Design of Columns (Staad : Concrete Design)

Kharagpur
Design of Columns (Hand Calculation)

Kharagpur
Design of Column (Hand Calculation)
DESIGN ANALYSIS OF COLUMN NO. 707
Factored load, Puz = 2459.7 KN
Column size 500mm x 500mm
Unsupported length, L0 = 3m
Grade of steel = 415 N/mm2
Grade of concrete, = 20 N/mm2
Clear cover = 40 mm
Calculation of slenderness ratio:
As per code IS456:2000, Slenderness ratio should be less than 12
퐿푒 = 1.5퐿 = 1.5 ∗ 3000 = 4500 푚푚
퐿푒 /퐷 = 4500/500 = 9 < 12
Hence, it is short column.

Calculation of minimum eccentricity:
As per code IS456:2000
푒 = 퐿0/500 + 퐷/30 = 3000/500 + 500/30 = 22.6 푚푚
푒 = 22.5 < 푒푚푖푛 = 퐷/20 = 500/20 = 25푚푚.
Therefore, additional moment can be neglected.
Calculation of area of steel required for longitudinal reinforcement:
As per code IS456:2000;
푃푢 = 0.4푓푐푘퐴푐 + 0.67푓푦퐴푠 = 0.4 ∗ 20 ∗ (500 ∗ 500 − 퐴푠) + 0.67 ∗ 415 ∗ 퐴푠
Therefore,
2459.7 ∗ 103 = 2000000 + 270 ∗ 퐴푠 퐻푒푛푐푒, 퐴푠 = 1701mm2
0.8% steel = 0.8*500*500/100 =2000mm2
As per code IS456:2000, minimum reinforcement required for column design is 0.8% of concrete area.
Hence, we should design the column for minimum reinforcement required.
As per code IS456:2000, minimum reinforcement required for column design is 0.8% of concrete area.
Therefore, As =2000mm2
Use 16 mm steel bar as main reinforcement.
Area of 16mm steel bar = 201 mm2.
Therefore, No. of bars = 2000/201 = 9.9
Provide 10-16mm steel bar as longitudinal/main reinforcement steel.

Calculation for tie reinforcement:
Diameter of tie bar ≥ diameter of bar used as main reinforcement/4
Therefore, diameter of tie bar ≥ 16/4 = 4mm
Therefore, use 8mm as tie reinforcement.
Spacing for tie reinforcement:
Spacing:
(1) Least of lateral dimension of the compression member = 500mm
(2) 16*(smallest diameter of main the longitudinal reinforcement) = 16*(16) = 256mm
(3) 300mm
Whichever is the least has to be provided.
Hence, provide 8mm diameter of tie reinforcement @250mm c/c.
Column Reinforcement Detailing:
Figure 4.2: Column Reinforcement Detailing
•

Summary for column 707
Size: 500 mm x 500 mm
Clear cover: 40 mm
Reinforcement: Provide 10 – 16 mm φ as longitudinal/main reinforcement.
Provide 8 mm φ @ 250 mm c/c.

Kharagpur
Design of Beam (Staad : Analysis)

Kharagpur
Design of Beam (Staad : Concrete Design)

Kharagpur
Design of Beam (Hand Calculation)

Kharagpur
Design of Beam (Hand Calculation)
Design analysis of Beam No. 909
(Following values directly taken from the STAAD Pro)
Grade of steel, fy = 415 N/mm2
Grade of concrete, fck = 20 N/mm2
Overall depth, D = 400 mm
Width, b = 300 mm
Length, L = 4225 mm
Clear cover c = 25 mm
Analysis:
Use 12 mm reinforcement bar. Hence,
Effective depth d= D-clear cover- diameter of steel bar/2
d= 400-25-12/2= 369 mm
Mu = 0.138fckbd2 for Fe 415
Maximum design moment= 65.93 kN.m
dmin= Mu(0.138fckb)
= 65.9*1060.138*25*300
= 252.44mm<400 mm (provided) …OK.
CALCULATION FOR MZ = -56.53 kNm AT L =
4.225m
(x/d) ratio required for given bending moment:
푥
푑
= 1.2 − 1.44 −
6.68푀푢
푓푐푘푏푑2
= 1.2 − 1.44 −
6.68 ∗ 56.53 ∗ 106
25 ∗ 300 ∗ 3692
= 1.2 − 1.03 = 0.17
퐿푒푣푒푟 푎푟푚 푧 = 푑 ∗ (1 − 0.416푥/푑)
= 369 ∗ (1 − 0.416 ∗ 0.17) = 343.14 푚푚
Area of steel required
퐴푠푡 =
푀푢
0.87푓푦 푧
=
56.5 ∗ 106
0.87 ∗ 415 ∗ 343.14
= 456.65 푚푚2

퐴푟푒푎 표푓 12 푚푚 푟푒푖푛푓표푟푐푒푚푒푛푡 푏푎푟 = 113 푚푚2
퐻푒푛푐푒, 푁표. 표푓 푏푎푟푠 푟푒푞푢푖푟푒푑 = 456.65/113 = 5
Hence, provide 5-12mm reinforcement steel in tension side at L = 4.2m where Mz = -47.53 kN.m
Note that the tension side is at the top of the beam.
CALCULATION FOR MZ = -34.54 kNm AT L = 0m
푥
푑
= 1.2 − 1.44 −
6.68푀푢
푓푐푘푏푑2
= 1.2 − 1.44 −
6.68 ∗ 34.54 ∗ 106
25 ∗ 300 ∗ 3692
= 1.2 − 1.1 = 0.1
퐿푒푣푒푟 푎푟푚 푧 = 푑 ∗ (1 − 0.416푥/푑) = 369 ∗ (1 − 0.416 ∗ 0.1) = 353.6 푚푚
퐴푠푡 =
푀푢
0.87푓푦 푧
=
ퟑퟒ. ퟓퟒ ∗ 106
0.87 ∗ 415 ∗ 336.46
= 284.67 푚푚2
Hence, provide 3-12mm reinforcement steel in tension side at L = 0m where Mz = -34.54 kN.m
Note that the tension side is at the top of the beam.

CALCULATION FOR MZ = 65.9kNm AT L = 2.1m
푥
푑
= 1.2 − 1.44 −
6.68푀푢
푓푐푘푏푑2
= 1.2 − 1.44 −
6.68 ∗ 65.9 ∗ 106
25 ∗ 300 ∗ 3692
= 1.2 − 1.01 = 0.19
퐿푒푣푒푟 푎푟푚 푧 = 푑 ∗ (1 − 0.416푥/푑) = 369 ∗ (1 − 0.416 ∗ 0.19) = 339.11 푚푚
퐴푠푡 =
푀푢
0.87푓푦 푧
=
65.9 ∗ 106
0.87 ∗ 415 ∗ 339.11
= 538.3 푚푚2
Hence, provide 5-12mm reinforcement steel in tension side at L = 2.1m where Mz = 20.38 kN.m
Note that the tension side is at the bottom of the beam.

Calculation for Distribution bars:
As per IS456:2000;
Area required for distribution = 0.12b*D/100
Therefore, area to be provided for distribution steel = 0.12*200*400/100 = 96 mm2
Use 8mm (2L) bar as distribution steel.
Spacing provided for distribution steel= 100.5*200/96 = 209.4 mm
Provide at the end of Beam
8mm (2L) distribution steel @200mm c/c.
And at the mid of spam of Beam
8mm (2L) distribution steel @220mm c/c.
Beam 463Summary:
Size: 4225 mm x 300 mm x 400 mm
Clear cover: 25 mm

Kharagpur
Design of Slab (Hand Calculation)
Design of Slab
Dimensions = 4 X 6 m2
Effective length = clear span + depth = 4.15 m
Floor finish = 1 KN/m2
Live load = 4 Kn/m2
Span to depth ratio = 30
Depth = (4.15/30) = 127.5 mm
Assume a depth of 150 mm
Provide 10ϕ bars
d = 150 -15 -5 = 130mm
Dead Load = 2.5*0.15 + 1 =4.75 Kn/m2
Live Load = 2 Kn/m2
Design Load = 1.5*(4.25+2) = 10.125Kn/m2
Since the ratio of longer side by shorter side is 1.5
design it as a one way slab
α y = 0.037
α x = 0.053
We get respective moments as
Mx = 8.568KnM
My = 5.994KnM
d = √(Mu/0.138FckbD)
=49mm < 130
Longitudinal Reinforcements
x/d = 1.2- √(1.44 – (6.6Mu/fckbD2))
= 0.015
Z = d*(1-0.42*0.015) = 127mm
Ast = Mu/fy*0.87*z
= 182 mm2 < 2%
Hence provide 300mm2

Kharagpur
Transverse Reinforcements
x/d = 1.2- √(1.44 – (6.6Mu/fckbD2))
= 0.012
Z = d*(1-0.42*0.012) = 127.5mm
Ast = Mu/fy*0.87*z
= 150 mm2 < 2%
Hence provide 300mm2
Check for shear
Maximum Design Shear = 0.33x10.125x6
= 20.04 Kn
Maximum Shear Stress = 20.04/(1000x130)
= 0.154 < 0.29 (For M25 Γ = 0.29 )
Check for deflection
Basic span to depth ratio = 21.66
Percentage of steel = 0.2
Fs =240.7
Modification factor = 1.1
Span to depth ratio = 33

Kharagpur

Kharagpur
Design of Staircase (Hand Calculation)
Design of Staircase
Nose = 25 mm
Rise = 150 mm
Going = 225 mm
Finish = 15mm (density = 23.5 N/mm2)
Breadth of Step = √ (G2 + R2)
= √ (2252 + 1502)
= 270 mm
Span/effective depth = 30
Waist = 100 mm
Total W = 100 + 15 + 6 = 121mm
Dead Load = (TR/2 +BW)*25 + (FT/G)*23.5
= 6.26kN/m2
Design Load = 1.5*(6.26 +5)
= 16.89kN/m
M = wl2/10
= 26kNm
Mu = 3.45bd2
Mu = 57.41 kNm
Area of main steel
M/bd2 = 1.56
P = 0.47 (from sp16 )
As = 606 mm2
Distribution steel
= 0.12%
= 150 mm2
Check for shear
V = wl/2 = 34.65 kN
V = 0.27N/mm2
Γ for M25 = 0.29 => safe
Check for deflection
% tension steel > 0.47
Multiplying factor = 1.2
Allowable L/d = 36 > 30 safe

Kharagpur
Design of Staircase (Hand Calculation)

Kharagpur
Design of Foundation (Staad. Foundation)
DESIGN ANALYSIS OF FOOTING
Pu = 1326.7 KN
Soil bearing capacity (SBC) = 210 KN/m2
Grade of concrete = 25 N/mm2
Grade of steel = 415 N/mm2
Clear cover = 50 mm
Required Plan area:
Service load due to DL and LL is 1326
Weight of footing is 10% of total service load =
10*1326/100 = 132.6 KN
Take weight of footing = 132.6 KN
Total service load = 1326+132.6 = 1458.6 KN
Area = 1458.6/210 = 6.94m
Assume square footing, therefore size of footing = √6.94
= 2.7m
Adopt size of footing as 2700mm x 2700mm
Depth for one way shear:
Assume minimum shear = 0.35 N/mm2
푑 =
푃푢 퐿 − 푎 2
2푃푢 + 2 0.35푁/푚푚2 ∗ 퐿2
Size of column is 500mm x 500mm
푑 = 13267 ∗
2 − 0.5 2
2 ∗ 1325.7 + 2 ∗ 350 ∗ 2. 7.2
= 0.36푚
Provide d = 360mm, D = 2700 mm.
Hence size of footing is 2700mm x 2700mm x
360mm

• Check of Depth for two-way shear:
• 푃푢 = 1326.7 푘푁
• For M20 grade concrete,
• 푃푒푟푚푖푠푠푖푏푙푒 푠ℎ푒푎푟 푠푡푟푒푠푠 = 0.25 푓푐푘
= 0.25 ∗ 25
= 1.25 푁/푚푚2
•
• 퐷푒푠푖푔푛 푠ℎ푒푎푟 =
푃푢
퐿2 ∗
퐿2− 푎+푑 2
4∗ 푎+푑 ∗푑
=
1326.7
2.72 ∗
2.72 − 0.5 + .360 2
4 ∗ 0.5 + 0.360 ∗ 0.360
= 962.84 푘푁/푚2 표푟 0.962 푁/푚푚2 < 1.25 푁/푚푚2 … 푂. 퐾.
• Hence, footing size is OK.
•
• Depth required for bending:
• 푀푢 = 푃푢 ∗
퐿−푎 2
8퐿
= 1326.7 ∗
2.7−0.5 2
8∗2.7
= 297.19푘푁. 푚
•
• 푑푚푖푛 =
푀푢
(0.138푓푐푘푏)
=
297.19 ∗ 106
0.138 ∗ 25 ∗ 2700
= 176.2푚푚 < 360 푚푚 (푝푟표푣푖푑푒푑) … 푂퐾.
• Hence, footing size is OK.

Calculation of Steel Area:
푥
푑
= 1.2 − 1.44 −
6.68푀푢
푓푐푘푏푑2
= 1.2 − 1.44 −
6.68 ∗ 297.19 ∗ 106
25 ∗ 2700 ∗ 3602
= 1.2 − 1.01 = 0.2
퐿푒푣푒푟 푎푟푚 푧 = 푑 ∗ (1 − 0.416푥/푑) = 360 ∗ (1 − 0.416 ∗ 0.2) = 330.18 푚푚
퐴푠푡 =
푀푢
0.87푓푦 푧
=
297.19 ∗ 106
0.87 ∗ 415 ∗ 330.88
= 2487 푚푚2

Footing Summary:
Size: 2700 mm x 2700 mm x 360 mm
Clear cover: 50 mm
푆푝푎푐푖푛푔 표푓 푏푎푟푠 = 2700 ∗
314
2487
= 340.9푚푚
Reinforcement: 20 mm φ @ 340mm c/c b/w
•

Kharagpur
Design of Foundation (Staad. Foundation)

Water Works Design
Kharagpur
Water Works Design
Back

Kharagpur
Water Works Design
Design of Storage Tanks
(Single room blocks)
Ground Level storage receiving supply from IIT main water pumping
station.
 Total floors (Occupied) : 4
 Number of rooms / floors : 48
 Number of occupants per room : 1
 Per capita water requirement : 200 L/day
(Vide National Building Code, 1983)

Kharagpur
Water Works Design
 Total water requirement of the Block : 19200 L/day
 Rate of pumping (assuming 8 pumping hours) : 1760 L/hr
 Average hourly demand : 800L/hr

Kharagpur
Water Works Design
Design of Storage Tanks
(Double room blocks)
Ground Level storage receiving supply from IIT main water pumping
station.
 Total floors (Occupied) : 4
 Number of rooms / floors :12
 Number of occupants per room : 2
 Per capita water requirement : 200 L/day
(Vide National Building Code, 1983)

Kharagpur
 Total water requirement of the Block : 17600 L/day
Water Works Design
 Average hourly demand : 734L/hr

Kharagpur
Water Works Design
Storage tanks Provided
Water Demand
Single room underground = 7400 litres
Single room Overhead = 7920 litres
Double room underground = 7640 litres
Double room Overhead = 8640 litres
Water Tanks Provided
Single room underground = 8000 litres (2 X4000)
Single room Overhead = 8000 litres (2 X4000)
Double room underground = 8000 litres (2 X4000)
Double room Overhead = 10000 litres (2X4000+1X2000)

Kharagpur
Design of Water Supply Pipes from Tanks
(Single blocks)
Reference SP 35
Water Works Design
Provisions(per floor)
Bathroom 6
Lavatory 6
Handwashes 6
Toilets 4
Two major pipes are carrying the water on both sides so effective fixture on
each pipe is about 35 fixture units

Kharagpur
Water Works Design
Calculation for Total Connections
 No. of floors : 4
Total fixture loss: 4 x 35 = 140
Head available and Head required are as shown
Req Ava
2.68 5
2.98 8
3.28 11
3.58 14

Kharagpur
Design of Water Supply Pipes from Tanks
(Double blocks)
Reference SP 35
Water Works Design
Provisions(per floor)
Bathroom 6
Lavatory 6
Handwashes 6
Toilets 4
Amajor pipes is carrying the water on both sides so effective fixture on each
pipe is about 70 fixture units

Kharagpur
Water Works Design
Calculation for Total Connections
 No. of floors : 4
Total fixture loss: 4 x 35 = 140
Head available and Head required are as shown
Req Ava
4.68 5
5.47 8
6.1 11
6.5 14

Kharagpur
Water Works Design
Design of Pipes
(Vide Figure 5 of SP 35)
Pipe Type Diameter
Main 50 mm
Subsidiary 20 mm
Distribution 15 mm

Design of Sewerage System
Kharagpur
Sewerage System Design
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Kharagpur
Design of Plumbing of Sewerage System
(B/D Blocks)
Fitment
Minimum
Requirement
Provided
Water closet 1 per 8 people 1 per 5 people
Urinal 1 per 25 people 1 per 7 people
Wash Basin 1 per 8 people 1 per 7 people
Bathroom 1 per 8 people 1 per 5 people

Kharagpur
Two - Pipe System

Kharagpur
Design of Sewerage Pipes
Pipe Type Diameter Reference
Horizontal 100 mm Table 52
Vertical 150 mm Table 53
Ventilation 50 mm ---
Wash Basin 30 mm Table 54
Urinal & Bathroom 50 mm Table 54
Rain Water 150 mm Table 57

Kharagpur
Design of Septic Tank
(B/D Blocks)
Fitment
Minimum
Requirement
Provided
Water closet 1 per 8 people 1 per 5 people
Urinal 1 per 25 people 1 per 7 people
Wash Basin 1 per 8 people 1 per 7 people
Bathroom 1 per 8 people 1 per 5 people

Kharagpur
Design of Septic Tank (Contd…)
 Fixture Unit = 396
 Peak Discharge from table 32 of SP 35 = 397.4 L/min
 Tank Capacity (Clause 6.13.3.2)
 Sedimentation = .092 x 397.4 x 0.3 = 10.95 m3
 Sludge Digestion = 0.032 x 200 = 6.4 m3
 Sludge Storage = .0002 x 365 x 200 x 2 = 29.2 m3
 Seed Sludge = 2.92 m3
 Free Board = 36.5 x 0.3 = 10.95 m3
 Total Capacity = 96.92 m3

Kharagpur
Design of Septic Tank (Contd…)
 Area of tank = 36.5 m2
 Total depth of tank = 2.65 m
 l/b ratio = 2.5 : 1
Dimensions
Length 10 m
Breadth 4 m
Width 2.7 m

Road Network and Pavement Design
Kharagpur
Road Network & Pavement Design
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Kharagpur
Road Network and Pavement Design
Design Parameters & References
On an average for IIT Kharagpur campus:
 Wind velocity is 10-25 km/hr
 Annual rainfall is about 1800 mm
 Average humidity varies between 80-90%
Reference used for design: IRC SP 72

Kharagpur
Road Network and Pavement Design : Road Alignment
Road Alignment
 Carriageway width = 5.5 m (Intermediate lane)
 Camber : 2 % (Straight line type)
 Shoulder Slope : 2%
 Minimum design speed : 30 km/hr
 Ruling design speed : 40 km/hr
 Building & Control Line : 25 m

Kharagpur
Super elevation (for r = 100 m) = 4% for v = 30 km/hr
 Side drain : Trapezoidal type

Kharagpur
Kerb : Mountable type
210
20
70
160
10
100
110

Kharagpur
Design of Super elevation

Kharagpur
Thus, N = 80,000 ESAL
Road Network and Pavement Design : Pavement design
Pavement Design
 Assumptions for ESAL calculation
• Growth rate, r = 0% p.a.
• Average Daily Traffic (ADT), To = 15 ESAL/day
• Design life n = 10 Years
• For Intermediate Lane L = 1
 The cumulative ESAL applications (N) over the design life can be
computed using the following formula :

Kharagpur
Road Network and Pavement design : Pavement design
Subgrade
 CBR = 5%
Base
 Water Bound Macadam (WBM)
 Thickness = 275 mm
Surfacing
 Premix Carpet of thickness = 20 mm

Kharagpur
Premix Carpet
(thickness = 20)
20 Water Bound Macadam (WBM)
Road Network and Pavement design : Pavement design
Drainage
 Thickness of the Sub-surface drainage layer = 100 mm
Prepared Subgrade
(thickness = 300)
275
300
(thickness = 275)
Pavement Design
Sub-surface Drainage layer
(thickness = 100)
100
5500.0

Cost Estimation
Kharagpur
Cost Estimation
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Kharagpur
Cost Estimation for the Complex
S No Particulars Quantity Rate Cost
Cost Estimation
1 Earthwork in excavation
2 Filling between GL & PL
3 Brickwork
4 Plastering of Inside Surface
5 Plastering of Outside Surface
6
7

Kharagpur
Cost Estimation
8
9
10
11
12
13
14
15

Kharagpur
Cost Estimation
16
17
18
19
20
21
22
23

Kharagpur
Questions

Kharagpur
Softwares Used
Softwares Used
 AutoCAD 2007
 Staad Pro 2006
 Google Sketchup
 Microsoft Office 2007

Kharagpur
Special Thanks to
Prof S K Barai
Structural Engineering
Prof S J Hossain
Structural Engineering
Prof M A Reddy
Transportation Engineering

End of Presentation
Kharagpur
Thankyou

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