Important Advice To Asfp Members, Structuralrndesigners, Steel Fabricators, Specifiers And Regulatoryrnenforcement Authorities

摘要

Beams that contain openings, whether created within a rolled section or during fabrication, need to be considered totally differently to solid beams when considering their fire protection requirements. Structural failure of such beams may be very different to normal beams and it is for the designer to provide the limiting temperature for any section design, taking account of the nature of the critical stresses.rnGuidance on the appropriate product performance testing and the procedure for determining the appropriate thickness of any product designed to provide the required fire protection to these types of beam is detailed in the ASFP publication, Fire protection for structural steel in buildings (the 'Yellow Book'). However, in the case of intumescent coatings, the current guidance is limited to beams with circular openings.rnSome steel beam manufacturers already have proprietary software that can reliably provide the necessary information for beams with other shaped openings. Without such data, manufacturers of intumescent coatings cannot specify the required product thickness for beams with non-circular openings.