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National Building Code 2005 Part IV on ‘Fire and Life Safety’ gives the Planning Considerations for Buildings

Fire Safety Regulations

NBC Considerations

• Any area exceeding 500 m2 shall be

divided into compartments by fire

resistant walls


Staircase/Exit Requirements

Minimum width — the minimum width of

staircase shall be as follows:

a) Residential buildings (dwellings) 1.0 m

NOTE— for row housing with 2 storeys,

the minimum width shall be 0.75 m

b) Residential hotel buildings 1.5 m



Minimum width — the minimum width of

staircase shall be as follows:

c) Assembly Buildings like Auditoria,

Theatres, Cinema Halls, etc. – 2.0 m

d) Educational Building- 1.5 m

e) Industrial Building- 2.0 m

f) All other Buildings- 1.5 m


Staircase/Exit

Requirements

•The minimum width of

tread without nosing shall

be 250 mm for residential

buildings

•The minimum width of

tread for other buildings shall be 300 mm



The maximum height of riser shall be-

•190 mm for residential buildings and

•50 mm for other buildings and

• these shall be limited to 16 per flight


Staircase/Exit

Requirements

•The minimum head-

room in a passage under

the landing of a staircase

shall be 2.2 m

•The minimum clear

head-room in any

staircase shall be 2.2 m



•All aspects of exit requirements for

corridors, doors, staircases, ramps, etc.

in respect of widths, travel distance shall

be as per NBC 2005, Part 4 ‘Fire and

Life Safety’

•Lobbies should not carry more than 30

people per 100m2


Provisions for Physically Handicapped

•The minimum width of corridors in buildings

serving patients bedrooms and from the point of

view of physically handicapped people, shall be

2400 mm

Fire Safety Regulations Requirements of IS 1643-

1977

• some persons or people should be

trained to use methods & equipments

according to IS 1648-1961

• All fire escape routes, emergency exits,

and location of fire fighting equipment

should be clearly marked and sign

posted, both in English and in the local

language


Requirements of IS

1643-1977

• Warning and alarm

devices are installed

• Fire resisting doors or

roller shutters conforming to

relevant Indian Standard

are provided at selected

places along all escape

routes


Fire Resisting Door


Requirements of IS

1643-1977

• Typical corridor and

lobby escape routes

should be as shown in IS

I 643-77


Requirements of IS

1643-1977

• Roof Escapes: The roof

or any associated routes

shall have direct access

to the ground

• Horizontal Escapes: The

application shall depend

on the layout of the

building and any adjoining

building(s)


Requirements of IS

1643-1977

• Fire Escape Chutes: The

Special Tunnels provided

for rescue operations


Internal Staircases :

The factors used in the calculation

for width of internal staircases are:

(a) Unit Width: Fifty centimetres

shall be considered the unit

width required by people moving

in single line

(b) Experiments have shown that 40

people can easily be evacuated

per minute through a one- unit,

width. The rate of evacuation is

also known as 'discharge rate’


Internal Staircases :

The factors used in the

calculation for width of

internal staircases are:

c) Each storey of a building

shall be evacuated on to

the stairs in a maximum

time of 2-1/2 minutes and

the ground floor in the

same interval


STAIRCASES SERVING A SINGLE

FLOOR :

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