Performance of materials, products and structures

Much of the guidance in this document is given in terms of performance classifications in relation to British or European Standards. In such cases, it will be necessary to demonstrate that a system or product can meet the relevant performance classification. This will be achieved if the system or product – (a) is in accordance with a specification or design that has been shown by a specific test to be capable of meeting that performance classification; (b) has been assessed by applying relevant test evidence, in lieu of a specific test, as being capable of meeting that performance classification; or (c) has been designed by using relevant design standards in order to meet that performance classification. Note: Some products are subject to Classification Without Further Testing (CWFT). For the purposes of this technical booklet, such products can be considered to have been shown to be capable of meeting a performance specification as per paragraph 1.6A(a).