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Occupancy category C.2: long term occupancy, managed Atrium/accommodation method of separation

Enclosed: 60 min fire-resisting (integrity and insulation) and smoke retardant construction

Means of escape provision

Where escape from the accommodation is to be via the atrium, means of escape in two directions to independent protected escape routes should be provided. There should be an 18 m maximum travel distance from front door to nearest storey exit or a fire door leading to a protected corridor

Evacuation strategy. Individual occupancy Smoke control system

Smoke control system Yes designed to ensure that untenable conditions are not created in means of escape in atrium (see 24.2)

Occupancy category C.3: short term

Smoke retardant construction

30 min fire-resisting (integrity and insulation) and smoke retardant construction

Associated areas sprinkler system

Temperature control Where escape from the accommodation is via a balcony, which is separated from the associated floor area by smoke retarding construction, means of escape in two directions to independent protected escape routes should be provided. There should be an 18 m maximum travel distance from bedroom door to nearest storey exit or a fire door leading to a protected corridor A protected escape route directly Smoke clearance from the accommodation independent from the atrium

Fire alarm and warning system

Use of atrium base

Appropriate for Controlled the equivalent fire load non-atrium building. Automatic fire detection for atrium, smoke control as appropriate

Exemplar

19

BS 5588-7:1997

40

Table 3 — Occupancy category C: occupants who are likely to be asleep (continued)

Evacuation strategy. Simultaneous

Yes

Type L1 AFD system, and voice alarm throughout the building

Controlled fire load

22

No

Type L1 AFD system, and voice alarm throughout the building

Controlled fire load

20

Section 5

Š BSI 8 December 2004

Bs 5588 71997 fire precautions in the design, construction a  
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