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Section 5

BS 5588-7:1997

Is the smoke exhaust ventilation system provided from each storey?

Yes

No

Is the atrium 18 m or less high?

Yes

Stairs should be sized for simultaneous evacuation

Stairs should be sized for simultaneous evacuation

Provide L2 AFD within atrium and associated areas including voice alarm throughout building

Provide L2 AFD within atrium and associated areas including voice alarm throughout building

No combustible content within atrium base

Provide smoke exhaust system within atrium

Provide sprinkler system in associated floor area(s)

No limit on height of open atrium See exemplar 11

No

Open atrium more than 18 m not permitted unless smoke exhaust ventilation system provided from each storey

Controlled fire load within atrium base

Provide sprinkler system in associated floor areas See exemplar 12

Figure 4a — Occupancy category B: occupants who are awake but may be unfamiliar with the building — Atrium open

© BSI 8 December 2004

29

Bs 5588 71997 fire precautions in the design, construction a  
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