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

PlanningStructural

design

Water supply system

Sewerage system

Road Network

Cost Estimation

CONTENTS

Planning of the Hostel Complex


Kharagpur


Back

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


Kharagpur


Hostel Complex(G+4)

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


Kharagpur

Planning of the Hostel Complex – Sports Facilities

Outdoor Sports Facilities

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


Kharagpur

Planning of the Hostel Complex – Other Amenities

STUDENT ACTIVITY CENTRE(25×50m)

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


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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.


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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.


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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.


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MAIN BUILDING

Group activities can be discussed.

Seminars and workshops can be organized.

Second floor: TV room or Common room

TV

Seating Capacity: 400

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:


Kharagpur


MAIN BUILDING

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.


Kharagpur


MAIN BUILDING (Cont…)

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

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


MAIN BUILDING (Cont…)

Parking Facilities for Bicycles

Entire G-floor of all Double room blocks is allotted for parking.

Parking Space will be numberedFor 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


Kharagpur

Planning of the Hostel Complex – Other Facilities

Other Facilities – Parking

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


Kharagpur


Other Amenities

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.


Kharagpur


Other Amenities

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


Kharagpur


Other Amenities

Internet Connection

Both wired and wireless facilities for Internet

Battery Powered during mains off

Fiber optic cables to be used throughout for high speed


Kharagpur


Other Amenities

Solar Power system

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


Other Amenities (Special)

Two messes are provided.

Seating capacity of each mess:500

LCD TVs for entertainment.

Automatic roti making machines.

External gas station.


Kharagpur

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

Columns (500 x 500 mm)

Beams (300 x 400 mm)

Slab (150 mm thick)

Staircase

Foundation


Kharagpur


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

𝐿𝑒 = 1.5𝐿 = 1.5 ∗ 3000 = 4500 𝑚𝑚𝐿𝑒/𝐷 = 4500/500 = 9 < 12

Hence, it is short column.

Calculation of minimum eccentricity:

As per code IS456:2000

𝑒 = 𝐿0/500 + 𝐷/30 = 3000/500 + 500/30 = 22.6 𝑚𝑚𝑒 = 22.5 < 𝑒𝑚𝑖𝑛 = 𝐷/20 = 500/20 = 25𝑚𝑚.

Therefore, additional moment can be neglected.

Calculation of area of steel required for longitudinal reinforcement:

As per code IS456:2000;

𝑃𝑢 = 0.4𝑓𝑐𝑘𝐴𝑐 + 0.67𝑓𝑦𝐴𝑠 = 0.4 ∗ 20 ∗ (500 ∗ 500 − 𝐴𝑠) + 0.67 ∗ 415 ∗ 𝐴𝑠

Therefore,

2459.7 ∗ 103 = 2000000 + 270 ∗ 𝐴𝑠 𝐻𝑒𝑛𝑐𝑒, 𝐴𝑠 = 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/2d= 400-25-12/2= 369 mmMu = 0.138fckbd2 for Fe 415Maximum design moment= 65.93 kN.mdmin= 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:

𝑥

𝑑= 1.2 − 1.44 −

6.68𝑀𝑢

𝑓𝑐𝑘𝑏𝑑2

= 1.2 − 1.44 −6.68 ∗ 56.53 ∗ 106

25 ∗ 300 ∗ 3692

= 1.2 − 1.03 = 0.17

𝐿𝑒𝑣𝑒𝑟 𝑎𝑟𝑚 𝑧 = 𝑑 ∗ (1 − 0.416𝑥/𝑑)= 369 ∗ (1 − 0.416 ∗ 0.17) = 343.14 𝑚𝑚

Area of steel required

𝐴𝑠𝑡 =𝑀𝑢

0.87𝑓𝑦𝑧

=56.5 ∗ 106

0.87 ∗ 415 ∗ 343.14= 456.65 𝑚𝑚2

𝐴𝑟𝑒𝑎 𝑜𝑓 12 𝑚𝑚 𝑟𝑒𝑖𝑛𝑓𝑜𝑟𝑐𝑒𝑚𝑒𝑛𝑡 𝑏𝑎𝑟 = 113 𝑚𝑚2

𝐻𝑒𝑛𝑐𝑒, 𝑁𝑜. 𝑜𝑓 𝑏𝑎𝑟𝑠 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑 = 456.65/113 = 5Hence, 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


𝑥

𝑑= 1.2 − 1.44 −

6.68𝑀𝑢


= 1.2 − 1.44 −6.68 ∗ 34.54 ∗ 106

25 ∗ 300 ∗ 3692

= 1.2 − 1.1 = 0.1

𝐿𝑒𝑣𝑒𝑟 𝑎𝑟𝑚 𝑧 = 𝑑 ∗ (1 − 0.416𝑥/𝑑) = 369 ∗ (1 − 0.416 ∗ 0.1) = 353.6 𝑚𝑚Area of steel required


0.87𝑓𝑦𝑧

=𝟑𝟒. 𝟓𝟒 ∗ 106

0.87 ∗ 415 ∗ 336.46= 284.67 𝑚𝑚2


𝐻𝑒𝑛𝑐𝑒, 𝑁𝑜. 𝑜𝑓 𝑏𝑎𝑟𝑠 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑 = 284.67/113 = 3Hence, 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


𝑥

𝑑= 1.2 − 1.44 −

6.68𝑀𝑢


= 1.2 − 1.44 −6.68 ∗ 65.9 ∗ 106

25 ∗ 300 ∗ 3692

= 1.2 − 1.01 = 0.19𝐿𝑒𝑣𝑒𝑟 𝑎𝑟𝑚 𝑧 = 𝑑 ∗ (1 − 0.416𝑥/𝑑) = 369 ∗ (1 − 0.416 ∗ 0.19) = 339.11 𝑚𝑚



0.87𝑓𝑦𝑧

=65.9 ∗ 106

0.87 ∗ 415 ∗ 339.11= 538.3 𝑚𝑚2


𝐻𝑒𝑛𝑐𝑒, 𝑁𝑜. 𝑜𝑓 𝑏𝑎𝑟𝑠 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑 = 538.3/113 = 5

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

𝑑 =𝑃𝑢 𝐿 − 𝑎 2

2𝑃𝑢 + 2 0.35𝑁/𝑚𝑚2 ∗ 𝐿2

Size of column is 500mm x 500mm

𝑑 = 13267 ∗2 − 0.5 2

2 ∗ 1325.7 + 2 ∗ 350 ∗ 2. 7.2

= 0.36𝑚

Provide d = 360mm, D = 2700 mm.

Hence size of footing is 2700mm x 2700mm x

360mm

• Check of Depth for two-way shear:

• 𝑃𝑢 = 1326.7 𝑘𝑁

• For M20 grade concrete,

• 𝑃𝑒𝑟𝑚𝑖𝑠𝑠𝑖𝑏𝑙𝑒 𝑠ℎ𝑒𝑎𝑟 𝑠𝑡𝑟𝑒𝑠𝑠 = 0.25 𝑓𝑐𝑘

= 0.25 ∗ 25= 1.25 𝑁/𝑚𝑚2

•

• 𝐷𝑒𝑠𝑖𝑔𝑛 𝑠ℎ𝑒𝑎𝑟 =𝑃𝑢

𝐿2 ∗𝐿2− 𝑎+𝑑 2

4∗ 𝑎+𝑑 ∗𝑑

=1326.7

2.72∗

2.72 − 0.5 + .360 2

4 ∗ 0.5 + 0.360 ∗ 0.360

= 962.84 𝑘𝑁/𝑚2 𝑜𝑟 0.962 𝑁/𝑚𝑚2 < 1.25 𝑁/𝑚𝑚2 … 𝑂. 𝐾.

• Hence, footing size is OK.

•

• Depth required for bending:

• 𝑀𝑢 = 𝑃𝑢 ∗𝐿−𝑎 2

8𝐿= 1326.7 ∗

2.7−0.5 2

8∗2.7= 297.19𝑘𝑁. 𝑚

•

• 𝑑𝑚𝑖𝑛 =𝑀𝑢

(0.138𝑓𝑐𝑘𝑏)

=297.19 ∗ 106

0.138 ∗ 25 ∗ 2700

= 176.2𝑚𝑚 < 360 𝑚𝑚 (𝑝𝑟𝑜𝑣𝑖𝑑𝑒𝑑) … 𝑂𝐾.

• Hence, footing size is OK.

Calculation of Steel Area:


𝑥

𝑑= 1.2 − 1.44 −

6.68𝑀𝑢


= 1.2 − 1.44 −6.68 ∗ 297.19 ∗ 106

25 ∗ 2700 ∗ 3602

= 1.2 − 1.01 = 0.2

𝐿𝑒𝑣𝑒𝑟 𝑎𝑟𝑚 𝑧 = 𝑑 ∗ (1 − 0.416𝑥/𝑑) = 360 ∗ (1 − 0.416 ∗ 0.2) = 330.18 𝑚𝑚



0.87𝑓𝑦𝑧

=297.19 ∗ 106

0.87 ∗ 415 ∗ 330.88= 2487 𝑚𝑚2


Footing Summary:

Size: 2700 mm x 2700 mm x 360 mm

Clear cover: 50 mm

𝑆𝑝𝑎𝑐𝑖𝑛𝑔 𝑜𝑓 𝑏𝑎𝑟𝑠 = 2700 ∗314

2487= 340.9𝑚𝑚

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

Water Works Design

Total water requirement of the Block : 17600 L/day

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

Water Works Design

Design of Water Supply Pipes from Tanks (Single blocks)

Reference SP 35

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

No. of floors : 4

Total fixture loss: 4 x 35 = 140

Calculation for Total Connections

Head available and Head required are as shown

Req Ava

2.68 5

2.98 8

3.28 11

3.58 14


Kharagpur

Water Works Design

Design of Water Supply Pipes from Tanks (Double blocks)

Reference SP 35

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

No. of floors : 4

Total fixture loss: 4 x 35 = 140

Calculation for Total Connections

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

70

20

160

100

110

10


Kharagpur


Design of Super elevation


Kharagpur

Road Network and Pavement Design : Pavement design

Thus, N = 80,000 ESAL

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

Road Network and Pavement design : Pavement design

Drainage

Thickness of the Sub-surface drainage layer = 100 mm

Prepared Subgrade

(thickness = 300)

300

275

20 Water Bound Macadam (WBM)

(thickness = 275)

Premix Carpet

(thickness = 20)

Pavement Design

Sub-surface Drainage layer

(thickness = 100)

100

5500.0

Cost Estimation


Kharagpur

Cost Estimation

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Kharagpur

Cost Estimation

S No Particulars Quantity Rate Cost

1 Earthwork in excavation

2 Filling between GL & PL

3 Brickwork

4 Plastering of Inside Surface

5 Plastering of Outside Surface

6

7

Cost Estimation for the Complex


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 J HossainStructural Engineering

Prof S K BaraiStructural Engineering

Prof M A ReddyTransportation Engineering

End of Presentation


Kharagpur

Thankyou

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