Staircases
Any building having more than one floor shall be provided with a staircase unless each such floor is independently accessible from ground.
minimum width of stair 120
cm
minimum width of tread 30
cm
maximum height of riser 15
cm
minimum height of handrail 90 cm
The minimum headroom under the landing of a staircase and under the staircase shall be 2.2m.
Building having more than three
floors including basement floor(s) shall have at least two staircases, one of
which may be a fire escape staircase:
Escalators
The width of escalators shall not be less than one metre.
Fire escape staircase
Fire escape staircase shall be
provided for every building under
- Residential occupancy exceeding three storeys above ground level
- Non-residential occupancies exceeding two storeys above ground level
Width of fire escape staircase shall not be less than one metre
Tread shall not be less than 25 cm
Riser shall not exceed 19
cm and the number of risers shall not exceed 16 per flight of stairs
Height of handrail of a fire escape staircase shall not be less than 100 centimetres and not more than 120 centimetres.
The use of spiral staircase shall
be limited to buildings up to 10 metres in height.
Spiral staircase shall not be less than 150 centimetres in diameter and shall be designed to give adequate head room.
Ramps
If provided as a substitute for stairways, shall be laid with a slope not exceeding 1 in 10 and such ramp shall comply with all requirements of a stairway and shall be surfaced with approved non-slippery materials.
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