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Clause 3.1 General Clause 3.2 Provision of compartment walls and compartment floors Clause 3.3 Fire resistance of elements of structure Clause 3.4 Test of fire resistance Clause 3.5 External wall Clause 3.6 Separating walls Clause 3.7 Compartment walls and compartment floors Clause 3.8 Protected shafts Clause 3.9 Protection of openings Clause 3.10 Exit staircases Clause 3.11 Concealed spaces Clause 3.12 Fire stopping Clause 3.13 Restriction of spread of flame over surfaces of walls and ceilings Clause 3.14 Roofs Clause 3.15 Materials for construction Clause 3.16 Use of plastic material Annex 3A - Notional Periods Of Fire Resistance Annex 3B - Permitted Limits Of Unprotected Areas

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Clause 3.10 Exit staircases

CPFPRTS 2022

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3.10.1 Non-combustibility of structure

Every exit staircase, including the treads/ risers and landing, shall be constructed of non-combustible materials.

3.10.2 Structure separating exit staircase

The exit staircase shall be separated from other parts of the station by a masonry structure or dry wall complying with Cl.3.8.7c.. which shall have fire resistance for not less than the period required by Cl.3.3 for Fire Resistance Elements of Structure.

3.10.3 Exit doors

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

3.10.4 Finishes

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