Page 7 - food store model (with first floor accomodation)

Reference Guide Fire Strategy

floor, in accordance with information provided by Co-op and taking account of the

recommendations of ADB Table C1. This value is further in accordance with Table 9 of
BS9999:2017.

Usage Floor Space Factor (m2/person)

Shop sales area 4.0
Office 6.0
Storage and Warehousing 30.0

Where a given population is known, for example number of staff likely to be present at any
one time, this value may be taken in lieu of an occupancy calculation undertaken. For

example, a store with 400m2 of free shop sales area may be allocated a population of 100
persons (400/4.0) plus a notional allowance of 5 members of staff.

1.4.3 Fire Exits

Where the anticipated population of a building, or part thereof, is >60 persons, ADB requires
that an alternative escape route is provided. Where two distinct exits are provided, it is

reasonable to assume that one of these may become unusable in the event of a fire, and it
follows that each individual exit should have sufficient capacity to accommodate the
population of the entire floorplate.

The following table outlines the exit capacity of exits from a given width:

Maximum number of persons Minimum width (mm)

60 750
110 850
220 1,050
More than 220 5mm per person

Note: the above requirements do not take account any further limitations stipulated in
Approved Document M: Access to and Use of Buildings.

Document Classification Final Document Ref: 3.1-RCS-RHSE-(110)-264 Version 1.1
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