Page 33

Evacuation strategy: simultaneous Atrium height

Atrium/accommodation Smoke control method of separation system

Associated areas sprinkler system

Fire alarm and warning system

Use of atrium base

Reference/notes

Exemplar

Section 5

Š BSI 8 December 2004

Table 1 — Occupancy category A: occupants who are awake and, predominantly, are familiar with the building

m

k18a

Enclosed or open: + Reservoir see Note 1

Smoke clearance

No

>18 k30

Enclosed or open: + Reservoir see Note 2

Smoke clearance

No

>30

Open

Smoke exhaust per storey

Yes

Enclosed: Smoke retarding

Temperature Yes control

a b c

Use and contents Note 1 Enclose top storey comparable with that with smoke retarding but not adjoining the atrium fire-resisting construction or form reservoir of equivalent volume at top of atrium Use and contents Note 2 Enclose the two top comparable with that storeys with smoke retarding adjoining the atrium but not fire-resisting construction or form reservoir of equivalent volume at top of atrium Provide L2 AFDb No combustible within atrium and content associated areas and alarm system throughout Provide L2 AFDb Controlled fire load within atrium and associated areas and alarm system throughout

Provide L2 AFDb within atrium and associated areas and alarm system throughout Provide L2 AFDb within atrium and associated areas and alarm system throughout

2

3

1

4

This table is not applicable for buildings of two storeys [see 1e)]. L2 AFD = Automatic fire protection system type L2 (see BS 5839-1). Sprinklers may be required as part of the fire engineering solution.

BS 5588-7:1997

27

Bs 5588 71997 fire precautions in the design, construction a  
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