unit 2 site plan & planning of buildings

BUILDING PLANNING AND DRAWING (15CE35D) 2020-21

UNIT 2

SITE PLAN & PLANNING OF BUILDINGS

2.1 Drawing of site plan Showing Setbacks, Floor Area Ratio, Height

of the building and Minimum distance from Power Line as per National

Building Plan (NBC)

Plinth area: It is the built-up covered area measured at the floor level of the

basement or of any storey.

Floor Area Ratio: It is ratio of Plinth area to Site area.

The distance in accordance with the current electricity rules and its

amendments from time to time is to be provided between the building and overhead

electric supply line.

2.1: Table-1: Electricity guidelines to lay electric lines

Vertically Horizontallya) Low and medium voltage

lines and service lines2.50 m. 1.20 m.

b) High voltage lines up to

and including 11,000 volts3.70 m. 1.20 m.

c) High voltage lines above

11,000 volts and up to and

including 33.000 volts

3.70 m. 2.00 m.

d) Extra high voltage lines

additional 33.000 volts

Plus 0.3m for every additional

33,000V or part thereof.

Plus 0.3m for every additional

33,000V or part thereof.

Built up Area, Number of storeys and Marginal Distances for Residential

Buildings:

The regulations are divided generally into two parts viz

1) Buildings in Gaothan and Semi Gaothan areas,

2) Buildings in Non-Gaothan Area. The details of these regulations are given in

below table 2.

Table 2: Regulations about Gaothan and Semi-Gaothan areas

1 | P a g e

CIVIL ENGINEERING


Sl No

Plot

Size

group

Maximum

built up

area

(percent)

Maximum

No Of

Storeys

Maximum

No of

tenements

Minimum marginal

open space (m)

Gaothan and Semi-Gaothan Areaa Roads Sides Rear

1 Less

than 50

m2

80

Ground

and two

upper

4 1.5 - -

2 Between

50 m2

and <

100m2

70 -do- 4 1.5 - -

3 Between

100m2

and <

150m2

60 -do- 4 1.5 1.5 1.5

4 Between

150m2

and

<300m2

50 -do- 6 3.0 1.5 1.5

5 300m2

and

above

40 -do- 6 3.0 2.5 3.0

The site plan shall indicate the following, namely: -

1) Title of drawing consisting of the property number of the site name of the block.

Street or road in which the site is situated, number of the site if situated in an

approved layout, and reference number of such approval with the use of the building.

2 | P a g e

CIVIL ENGINEERING


2) The boundaries of the site and of any contiguous land belonging to the owner

thereof.

3) The North direction relative to the plan of the building.

4) The name and description of the adjacent roads, street, or lanes, if any, with the

width thereof; Building Bye-Laws.

5) The position of the adjacent plots whether vacant or built up.

6) The area to be occupied by the proposed building and the setbacks proposed for

proper air and ventilation.

7) Any physical features such as wells, drains, transmission lines, etc..

8) Natural features like existing trees, ridges, valleys etc.

Calculation of drawing lengths:

Drawing length = Scale X Actual length in centimetres or millimetres

Site plans:

If the given is Scale = 1:100

Example: If the size of plot is 9m X 12m

Drawing length = scale x Actual length in centimetres

Drawing length for 1m = X (1X100) = 1 cm

1-meter actual length = 1cm drawing length

Drawing length for 9m = 9 X1 = 9cm

Drawing length of 12m offset = 12 X 1 = 12cm

Drawing length for 2.5m offset = 2.5X1 = 2.5cm

If the given scale is = 1:200

Example: If the size of plot is 9m X 12m

Drawing length = scale x Actual length in centimetres or millimetres

3 | P a g e

CIVIL ENGINEERING


Drawing length for 1 m = x (1x100) = 0.5 cm

1-meter actual length = 0.5cm drawing length

Drawing length for 9m = 9 x0.5 = 4.5cm

Drawing length of 12m offset = 12 x 0.5 = 6cm

Drawing length for 2.5m offset = 2.5x0.5 = 1.25cm

Procedure for Drawing Site Plan:

• Convert the sizes of the site and properties attached to the site according to

given scale.

• Draw the Length and Breadth of site as per size and orientation

• Leave Setbacks/Offsets inside the site from all sides as per given data or as

per Bye- Laws to get built up area/plinth area.

• Hatch the Built-up area (45°)

• Draw properties attached to the site outside as per given size and orientation

given.

• Label the title of the property inside the drawing.

• Show the North direction, Title of site plan and scale at bottom of drawing.

• Show the Calculations site area, plinth area, Plot coverage and F.A.R

Example Problem - 1

Draw a plan of a layout to a scale of 1:200 with the following details.

4 | P a g e

CIVIL ENGINEERING


Calculate maximum percentage coverage

Site dimension 15m x 20m

North south 20m

East west 15m

Road width 12m North side

Set back Front 2.5m

Rear 1.5m

Right 2m

Left 1.25m

FAR 1.5

Calculate the maximum area of the building

Figure 1: Site plan 1

Example Problem - 2

5 | P a g e

CIVIL ENGINEERING

Plot Area = (15 x 20) = 300sq.mt

Width of plinth = 15-2-1.25 = 11.75m

Length of plinth = 20-2.5-1.5 = 16m

Plinth area = 11.75 x 16 = 188sq.mt

Built up area = (188/300) 100 = 62.66%


Draw a plan of a layout to a scale pf 1:200 with the following details.

Site No. 321


Orientation

North Site number 322

South Site number 320

East 25m wide road

West Site number 311

Set back Front 3m

Rear 1.2m

Right 1.5m

Left 1.5m


6 | P a g e

CIVIL ENGINEERING


Width of plinth = 12-1.5-1.5 = 9.00m

Length of plinth = 18-3-1.2 = 13.80m

Plinth area = 9 x 13.8 = 124.20sq.mt

Built up area = (124.2/216)100 =57.50%


Example Problem - 3

Draw a plan of a layout to a scale of 1:100 with the following details.

Site No. 123


North 30m Road

South Site number 140

East Site No 124

West Site No 122

Set back Front 3m

Rear 1.2m

Right 1.5m

Left and Right 1.2m


7 | P a g e

CIVIL ENGINEERING


Width of plinth = 12-1.5-1.5 = 9.00m

Length of plinth = 18-3-1.2 = 13.80m

Plinth area = 9 x 13.8 = 124.20sq.mt

F A R =124.2 / 216 =0.575


Example Problem - 4

Draw a plan of a layout site measuring 9mX12m to a scale of 1:00 with the following

details and calculate the percentage of area covered

Site No. 361

Orientation : North to South 12m

East to West 9m

Chakkbandhi : North 9m wide

South Site No 342

East Site No 360

West Site No 362

Minimum setbacks

Front and Rear 1.50mtr

Right and left 1.50mtr


8 | P a g e

CIVIL ENGINEERING

Plot Area = (9X12) = 108 Sq.mt

Width of plinth = 9-1.5-1.5 = 6.00m

Length of plinth = 12-1.5-1.5 = 9.00m

Plinth area = 6x9 = 54.00 sq.mt

F A R =54/108=0.50


Example Problem - 5

Draw the site plan to a scale of 1:200 Apply local Bye Laws for the following details

Site No. 89

Orientation:

North 20m wide road

South Site No 90

East 30m wide road

West Site No 88

Site Dimension 12mX18m

(18m wide facing east)

Building Coverage 60%


9 | P a g e

CIVIL ENGINEERING


Example Problem - 6

Draw the site plan to a scale of 1:200 Apply local Bye Laws

Site Dimension 9mX12m

Orientation:

East 9m Road

West Site No 205

North Site No 101

South Site No 99

Assume Suitable Setbacks


10 | P a g e

CIVIL ENGINEERING


Example Problem - 7

An outhouse measuring 6.5mX4m is proposed to be constructed in a site bearing No

5, Measuring East to West 12.0m and North to South 9.0m.Draw the site plan of the

proposed out house with following details to a scale of 1:100 Apply local building

Bye laws to setbacks

a) East Road

b) West Site No 18

c) North Site No 4

d) South Site No 6

Maximum open space is left in front of the proposed house for garden as present and

future construction.


11 | P a g e

CIVIL ENGINEERING


2.2 Given the floor area or carpet area of rooms plan the

building and draw a single line diagram of Building

Carpet Area: It is the living and sleeping area of rooms at any floor level

Carpet Area = Plinth area - Area under walls - Service area

Sizes of Doors:

• Internal doors 07 x 60

• External doors 1.2 x 2 m

• Door for bath and W.C. 0.75 x 2.0 m

• Public Buildings Width 1.5, 2.0, 2.5 m, Depth or height 2.0 m, 2.5 m

Sizes of Windows:

• Sizes of Windows: Width: 0.6, 0.75, 0.9, 1.0, 1.2, 1.5, 1.8m.

Depth: 0.6 0.75, 0.9, 1.0, 1.2, 1.5, 1.8 m

• Size of Ventilator: Width: 0.3, 0.45, 0.6. 0.75, 0.9 m

Requirement Parts:

Residential Buildings

a) Habitable rooms 9.5 m2 (Minimum width 2.4m)

b) Kitchen 5.5 m2 (Minimum width 1.8m)

c) Bath rooms 1.8 m2 (Minimum width 1.2m)

d) Combined Bath room and W.C 2.8 m2 (Minimum width 1.2m)

e) Water Closet 1.1 m2 (Minimum width 1.0m)

Location of the rooms shall be according Aspect and Grouping Principle (1.2.1 and

1.2.5)

12 | P a g e

CIVIL ENGINEERING


Schools and College Buildings

a) Entrance or Reception

b) Office and administrative block

c) Class rooms

Students below 10 yrs. Area 1.0 to 1.2 m2

Students above 10 yrs. Area 1.2 to 1.5 m2

d) General sizes of Class rooms 4.5mx6.00m, 5.5mx6.50m,

6.0mx7.20m,7.0mx 10.00m,

e) Principals Room

f) Staff room

g) Drawing Halls Area 3.0 to 4.0 m2/student

h) Laboratories Area 3.0 to 4.0 m2/student

i) Assembly Halls Area 0.5 to 0.6 m2/student

j) Circulation

k) Library

l) Parking Place

m) Sanitary block 1 Water closet for 40 boys and 1 water closet for

25 girls 1 Urinals for 20 boys

Hostel Building

a) Entrance 3mt wide

b) Rooms

For single person 9.5 m2/person (size 3.0mx3.1m)

For Two person 7.5 m2/person (size 3.5mx4.0m)

For Three person 7.0 m2/person (size 4.2mx5.0m)

c) Circulation

13 | P a g e

CIVIL ENGINEERING


d) Dining Halls Area 3.0 to 4.0 m2/student

e) Recreation Halls Area 2.0 to 3.0 m2/student

f) Kitchen (size 2.75mx3.00m)

g) Pantry (size 2.00mx3.00m)

h) Store (size 2.75mx3.00m)

i) Sanitary Block

1 Water closet for 10 boys and 1 water closet for 8 girls

1 Bath for 10 boys and 1 water closet for 10 girls

1 Urinals for 25 boys

Primary Health Centre

a) Entrance 2mt wide

b) Doctors Room size 2.75mx 4.00m

c) Examination and Dressing Room size 3.00mx 4.00m

d) Operation Theatre size 3.00mx 4.00m

e) Pantry size 2.00mx3.00m

f) Store size 2.75mx3.00m

g) Sanitary Block

Following points are important while drawing Line diagram:

Residential Building:

a) At least one of the walls of each room should be an external wall.

b) Veranda is located on the front side of building adjacent to the living room

c) Location of kitchen, Bath and W.C should be in the back portion of the Building.

d) Dining should be close to the Kitchen and at same time Kitchen should be away

from Living room.

e) The Bed room, Bath and Toilet may be grouped together for better privacy.

14 | P a g e

CIVIL ENGINEERING


f) Provide suitable passages where ever necessary.

School Building:

a) Rooms are arranged depending upon the number and sizes of the Rooms such that

the final plan is in the shape of Straight line, L, U, I. C (Open type Plan) or Square,

Rectangular (Closed type plan).

b) Provide the class rooms on one side and H.M room, Staff room and Office room on

another side or provide class rooms on both left and right portion of Building and

H.M room, Staff room and Office room on front or back portion of building with

suitable entrance provided with suitable size collapsible door in the centre.

c) Provide separate sanitary blocks for Girls and Boys in the back portion of the

building.

d) For easy circulation provide suitable corridors.

Hostel Building:


the final plan is in the shape of Straight line, L, U, I, H, E, C, T (Open type Plan) or

Square, Rectangular. Circular, hexagonal or multi-shaped (Closed type plan)

b) Provide the Students rooms including Warden room on one side and Dining, store.

Kitchen with Pantry on another side or provide students rooms on both left and

right portion of Building and warden room, Office room and Stores on front

portion of building with suitable entrance provided with suitable collapsible door

in the centre.

c) Provide sanitary blocks in the back portion of the building. Number of sanitary

units depends upon the number students.

d) For easy circulation provide suitable corridors.

Primary Health Centre:


the final plan is in the shape of Straight line, L, U, I (Open type Plan) or Square,

Rectangular (Closed type plan)

b) Waiting hall should be provided at the entrance of the building.

15 | P a g e

CIVIL ENGINEERING


c) Attached to the waiting hall Doctor's room is provided.

d) Doctor room, Investigation room, Laboratory cum Medicine should be accessible

from main entrance.

e) Staff Nurse's room should be connected to the wards

f) For easy circulation provide suitable corridors.

g) Separate sanitary units for Ladies and Gents are provided in the back portion of the

building.

Following things are to be shown in the Line Diagram:

a) Clear dimension of the room and type of room. (without thickness of wall)

b) Width of the Doors in the corner of room. Width of windows, Ventilators and

Collapsible door in the central part of the room's external wall.

c) Schedule of openings.

d) Title of the line diagram. Scale and North direction.

16 | P a g e

CIVIL ENGINEERING


EXAMPLE PROBLEM

1. Residential building:

Figure 8: Residential Building

17 | P a g e

CIVIL ENGINEERING


2. School Building

Figure 9: School building

18 | P a g e

CIVIL ENGINEERING


3. Hostel Building:

Figure 10: Hostel Building

19 | P a g e

CIVIL ENGINEERING


4. Primary Health Centre:

Figure 11: Primary Health Centre

20 | P a g e

CIVIL ENGINEERING


Assessments:

1. Draw the site plan of layout for a scale 1:200 with following details:

Size – 18 X 24m

North south – 24m

East west – 18m

Road 12m north side

Minimum set backs- Front side -3m

Rear side -2m

Right side -3m

Left side -1.5m

2. Prepare and draw line diagram to a scale of 1:100 for a residential building

from the given requirements. Provide suitable size and positions of the

openings:

Front veranda 2.5 X2.5m

Hall 7.8 X 4m

Bed room 4 X 3.5m

Kitchen 3 X 3m

Bathroom 2.2 X 1.6m

Water closet 2.2 X 1.2m

Utility 2 X 3m

21 | P a g e

CIVIL ENGINEERING


SUGGESTED STUDENT ACTIVITIES

1. Prepare a case study of nearby small public buildings verify and

draw the various views and judge the prevailing bye-laws.

2. Prepare a plan, elevation and section of a residential building

with split floors and roofs (Split floors and roofs have different

floor and roof levels).

3. Develop a plan of rain water harvesting, ground water recharge

and solar harvesting for your institution/any other building.

4. Develop a plan of solar harvesting for your institution/any other

building.

5. Prepare a plan of temporary construction shed and draw various

views.

6. Prepare a plan of bus stand and draw various views.

7. Prepare a plan of cycle stand and draw various views.

8. Study the difference between framed structure and a load

bearing structure and present it.

9. Incorporate the concepts of Green building technology in your

institute building.

10. Draw the plan elevation and sectional views of a pitched roof

residential building.

11. Draw the plan and sectional views of a soak pit and septic

tank.

12. Study of economising the cost of openings in building

13. Roof rainwater harvesting - a case study

22 | P a g e

CIVIL ENGINEERING

unit 2 site plan & planning of buildings

Documents