Classification rules for the end-use application of test results arising from BS 476-3, "Classification and method of test for external fire exposure of roofs"

Classification rules for the end-use application of test results arising from BS 476-3, "Classification and method of test for external fire exposure of roofs"

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1   Scope

This Published Document sets out a methodology for generating new classification rules for roof coverings tested in accordance with BS 476‑3:1958 and BS 476‑3:2004, which simplifies the specification of a roof covering in its end-use application as part of a roofing system. The document also considers the possible influences on the classification of single or multiple changes to the roof covering material and/or construction of the tested roofing system.

NOTE Applying the results of tests to an actual end-use application often requires specialist knowledge. This application is generally simplified if the tested roof covering/roofing system can be given a classification based upon the results of test(s) which is easily related to the end-use.

Where rules already exist, they are presented in Clause 4 and Clause 5.