ASFP launches 6th Edition of Yellow Book focused on structural steel protection

Long regarded as the definitive guide to structural steel fire protection, the Yellow Book has undergone significant changes to better serve its users. The latest edition introduces key developments designed to enhance usability, improve clarity and align the content with the very latest assessment methods and structural design standards.

Distinct volumes

In a move designed to cater to the specific needs of different users, the Yellow Book is now divided into three distinct volumes:

*Volume 1: Aimed at designers, specifiers and installers of structural steel fire protection, this segment focuses on Best Practice in terms of system design and material specification

*Volume 2: Dedicated to the testing and assessment of intumescent coatings

*Volume 3: Focused on the testing and assessment of other passive fire protection materials and systems, such as boards, batts, mortars and sprays

Volume 1 is available for immediate release due to its introduction of several key changes, while Volumes 2 and 3 are currently under development and will be released in due course.

Significant changes

There are significant changes introduced in the newly released Volume 1. In response to industry feedback, the 6th Edition introduces a simplified default critical temperature table, replacing the complex tables from the 5th Edition.

The revised table aligns with the UK National Annex of BS EN 1993-1-2:2005 Eurocode 3, providing a streamlined approach to structural fire design.

Temperatures are now lower than the traditional 550°C/620°C referenced in earlier editions, reflecting modern design advice and enhancing clarity for users.

The 6th Edition also adopts a revised method for calculating protection thicknesses for beams with web openings (ie cell beams). This includes using 500°C as the default critical temperature in the absence of a specified value, ensuring consistency with the latest structural design practices.

Seamless transition

In order to ensure a seamless transition for users, the ASFP will continue to host both the 5th and 6th Editions of the Yellow Book on its website, enabling industry professionals to access the guidance they need while Volumes 2 and 3 of the 6th Edition are finalised.

The 6th Edition of the Yellow Book represents a significant step forward for the fire safety industry, duly offering a clear and more user-friendly approach to structural steel fire protection.

This update is specifically about supporting designers, specifiers, installers and manufacturers in delivering Best Practice and compliance in what’s now an ever-evolving regulatory environment.

*For more information and to access the Yellow Book’s 6th Edition, visit the ASFP’s website at https://asfp.org.uk/page/ASFPTechnicalDocuments