Page 34

Evacuation strategy: phased Atrium height

Atrium/accommodation method of separation

Smoke control system

Associated areas sprinkler system

Fire alarm and warning system

Use of atrium base

Reference/notes

Exemplar

m

k30

>30

b c

5

Use and contents comparable with that adjoining the atrium

7

Temperature Yes control

Enclosed: fire resistance 30 min integrity & smoke retarding

Smoke clearance

No

Enclosed: fire resistance 30 min integrity

Pressure differential system: see Note 3

Nob

Enclosed: fire resistance 30 min integrity and pressure differential system

Pressure differential system: see Note 3

Yes

Controlled fire load Provide L2 AFDb to atrium and associated areas, including voice alarm throughout

Enclosed: fire resistance 30 min integrity and smoke retarding Enclosed: fire resistance 30 min integrity and pressure differential system

Smoke clearance

Yes

Pressure differential system: see Note 4

Yes

Controlled fire load Provide L2 AFDb to atrium and associated areas, including voice alarm throughout No combustible Provide L2 AFDb to atrium and associated content areas, including voice alarm throughout

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.

Provide L2 AFDb to atrium and associated areas, including voice alarm throughout Provide L2 AFDb to atrium and associated areas, including voice alarm throughout Provide L2 AFDb to atrium and associated areas, including voice alarm throughout

Controlled fire load

Note 3 Provide fire engineering solution by either atrium depressurization or pressurization of associated floor areas Note 3 Provide fire engineering solution by either atrium depressurization or pressurization of associated floor areas

6

10

8

9 Note 4 Atrium pressurization by applying all relevant clauses of BS 5588-4:1997

Section 5

Š BSI 8 December 2004

a

Controlled fire load

Enclosed: Smoke retarding

BS 5588-7:1997

28

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

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