BS 476: Pt. 31.1: 1983
“Methods for measuring smoke penetration through door sets and shutter assemblies”.
This British Standard is a method of test only for smoke containment for door assemblies, and does not specify any performance requirements to be achieved under the test. These are detailed in other publications such as BS 9999: 2008 and Approved Document B.
This link to British Standards Online may be of interest.
Relevant Lorient links: