UNSPECIFIED (2022) Methods for calculating acceptable unprotected area. In: UNSPECIFIED, (ed.) Approved Document B: Fire Safety - Volume 1: Dwellings. 2022 ed. Section 11: Resisting fire spread from one building to another, 1 (11.16). RIBA Publishing Publication, Place of Publication:, p. 89. ISBN 9781859469156
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Abstract
Two simple methods are given for calculating the acceptable amount of unprotected area in an external wall that is a minimum of 1000mm from any point on the relevant boundary. More precise methods are described in BRE report BR 187 and may be used instead. When using BR 187 the following radiation intensity at each unprotected area should be assumed.
a. 84kw/m2 if the purpose group of the building is ‘residential’ (purpose groups 1 or 2), ‘office’ (purpose group 3) or ‘assembly and recreation’ (purpose group 5) or if the building is an open-sided multi-storey car park (purpose group 7(b)).
b. 168kw/m2 if the purpose group of the building is ‘shop and commercial’ (purpose group 4), ‘industrial’ (purpose group 6) or ‘storage and other non-residential’ (purpose group 7(a)).
| Item Type: | Book Section |
|---|---|
| Additional Information: | tifidf-maui-text-analytics-keywords |
| Uncontrolled Keywords: | unprotected area, relevant boundary, calculations, purpose group, boundary, boundary |
| Subjects: | Section 11: Resisting fire spread from one building to another |
| Depositing User: | admin |
| Date Deposited: | 09 Jul 2022 09:50 |
| Last Modified: | 30 Sep 2022 05:12 |
| URI: | https://buildvoc.co.uk/id/eprint/1682 |
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Methods for calculating acceptable unprotected area. (deposited 09 Jul 2022 09:44)
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