Comparison of BS476-22 and EN 1364-1 Fire Resistance Standards

This technical report provides a comparative analysis of two significant fire resistance test standards for non-loadbearing wall elements: the British Standard BS 476-22:1987 and the European Harmonised Standard BS EN 1364-1:2015. The report outlines the application of these standards to fire-resistant cladding panels, particularly those produced by Kingspan Structural Products, and discusses the implications for compliance and certification. It details the scope and applicability of each standard, highlighting that BS 476-22 covers a broader range of non-loadbearing elements while EN 1364-1 focuses specifically on non-loadbearing walls. Key differences are examined, including test equipment and conditions, specimen requirements, performance criteria, and reporting obligations. The report also addresses regulatory implications, noting the UK's transition towards the EN harmonised system and the eventual discontinuation of BS 476 testing for product classifications. Overall, EN 1364-1 is identified as the more stringent standard, imposing stricter requirements throughout the testing process.