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Legend: Explanations & Illustrations Rationale Note Revision history Print

3.12 FIRE STOPPING

3.12.1 General provision

E

Openings for pipes, ducts, conduits or cables which pass through any part of a compartment (except for a part which does not serve as a fire resisting barrier) or cavity barrier, shall be:

a. kept as few in number as possible;

b. kept as small as practicable; and

c. all gaps shall be filled with fire-stopping materials.

R Rationale - Clause 3.12.1c

Fire-stopping materials will ensure the integrity of the fire compartment is maintained when penetrated by utility lines or pipes.

3.12.2 Fire-stopping

Materials for fire stopping shall have the necessary fire resistance when tested to BS 476: Part 20 or other acceptable standards.

3.12.3 Materials for fire-stopping

E

Suitable fire-stopping materials include:

a. Fire-stopping and sealing systems (including those designed for service penetrations) which have been shown by test to maintain the fire resistance of the wall or other element.

b. Other fire-stopping materials include:

(1) cement mortar;

(2) gypsum-based plaster;

(3) cement or gypsum-based vermiculite/perlite mixes;

(4) glass fibre, crushed rock, blast furnace slag or ceramic based products (with or without resin binders); and

(5) intumescent mastics.

The method of fire-stopping and choice of materials shall be appropriate to the situation and its application.