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Section 5

BS 5588-7:1997

No

Are the associated floors separated from the atrium by fire-resisting construction?

Fire engineering analysis required or reconsider degree of openness

No

Yes

No Is the smoke control provided by either atrium de-pressurization or pressurization of associated floor areas?

Yes

Go to figure 3e

No

Is the atrium pressurized in accordanceNone with BS 5588: Part 4?

Yes

Go to figure 3d

Figure 2b — Occupancy category decision process

Š BSI 8 December 2004

21

Bs 5588 71997 fire precautions in the design, construction a  
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