Page 49

Evacuation strategy. Progressive horizontal evacuation Height

Atrium/accommodation method of separation

Smoke control system

Accommodation sprinkler system

Fire alarm and warning system

Use of Atrium base

Reference/notes Exemplar

Section 5

Š BSI 8 December 2004

Table 4 — Occupancy category D: occupants requiring medical or nursing care

m

Unlimited

Enclosed 60 min fire resistance Smoke (integrity and insulation) and clearance smoke retarding

No

Unlimited

Enclosed 60 min fire resistance Smoke (integrity and insulation) and exhaust smoke retarding system

No

NOTE 1

L1 Automatic fire detection in atrium and compartments adjoining the atrium L1 Automatic fire detection in atrium and compartments adjoining the atrium

No combustible content

See Note 1

23

Controlled fire load

See Notes 1, 2, 3

23

The following facilities should not be provided in the atrium: sleeping accommodation, nursing or medical care, balcony seating areas.

NOTE 2 Occupants of category D premises are a particularly vulnerable section of society and in certain circumstances evacuation may cause them harm, or delayed recovery, or aggravate their medical condition. To ensure that smoke does not enter spaces adjoining the atrium, a smoke exhaust system is required to maintain a stable smoke layer 1 m above the uppermost opening into the atrium. NOTE 3 In hospitals, where operating theatres, intensive therapy units and other areas providing similar levels of care, have openings onto the atrium, these openings should be provided with protected lobbies.

BS 5588-7:1997

43

Bs 5588 71997 fire precautions in the design, construction a  
Read more
Read more
Similar to
Popular now
Just for you