Fire Engineering (CIBSE Guide) by anonymous

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2. 4 Escape available in one direction only Where the maximum occupancy of a room or storey exceeds 600 people at least three adequately separated exits should be provided. 6 Travel distances All the traditional prescriptive codes place limitations on the maximum distance that can be travelled to an exit. The travel distances should be measured along the route which will actually be travelled and not the direct (straight line) distance. 5 times the direct distance. 4. 7 Fire protection to escape routes Escape stairs and, in certain cases, escape corridors need to be enclosed with fire resisting construction to prevent the ingress of fire and smoke.

There is a tendency towards providing more reliable information to assist people in making the correct decisions in making their exit. This can be achieved by voice alarms or informative displays. 10 Multi-tenancy/multi-occupancy The combination of different purpose groups within the same building may call for additional provisions including better fire separation and separate means of escape. 11 Special building features Such special features include atria, environmental flues, single stair conditions, open spatial planning and extensive underground spaces.

5 times the direct distance. 4. 7 Fire protection to escape routes Escape stairs and, in certain cases, escape corridors need to be enclosed with fire resisting construction to prevent the ingress of fire and smoke. For escape purposes a minimum fire resistance of 30 minutes is normally recommended, although this may be increased if the stair also acts as a protected shaft providing separation between levels. B A It is important to prevent substantial smoke infiltration into protected escape routes and therefore all elements of the enclosing structure should be adequately sealed against smoke ingress; doors should be provided with smoke seals.

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