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Legend: Explanations & Illustrations Rationale Note Revision history Print

CLAUSE 3.10 EXIT STAIRCASES

3.10.1 Non-combustibility of structure

Every exit staircase, including the treads/risers and landing, shall be constructed of non-combustible materials. The exception is for buildings under PG I, where only the stringer or structures supporting the treads/risers and landing shall be constructed of non-combustible materials.

3.10.2 Compartmentation

E

The exit staircase shall be separated from other parts of the building by a masonry structure or drywall complying with Cl.3.8.7b. which shall have fire resistance for not less than the period required by Cl.3.3 for elements of structure. The flight, landing and supporting structures of the exit staircase shall comply with Cl.3.10.1 and fire resistance rating is not required.

3.10.3 Exit doors

Doors opening into the exit staircase shall have at least ½-hr fire resistance rating and fitted with an automatic self-closing device.

3.10.4 Finishes

E

Finishes to the ceilings/walls and floors of exit staircase shall be of non-combustible materials.