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Advisory Notes 38 ASFP Position on use of critical temperatures within 6th edition of the yellow book

Publication Year

2026

Document Status

Current

Abstract

Provides clarification for the recent changes within the 6th edition of the ASFP Yellow book, relating to critical steel temperature, to align more closely with the steel Eurocodes, multi-temperature analysis (MTA), and structural fire engineering. Presents simplified default critical temperatures and a new approach for cellular beams.

Document History

Current Issue: January 2026. Updated to correct reference to Advisory Note 24.

Publisher Information

Association for Specialist Fire Protection

Formed in 1975, the Association for Specialist Fire Protection currently represents the major U.K. based specialist manufacturers and installers of structural passive fire protection systems. They produce technical information to ensure built in fire protection in buildings.