What is the maximum thickness determination for TFIFRM testing on a truss?

In the context of TFIFRM (Thermal Fireproofing Impact Factory Run Measurements) testing for spray-applied fireproofing on trusses, the maximum thickness is crucial for ensuring that the material offers adequate fire resistance while conforming to safety standards. The determination of a maximum thickness of 60 mils ensures that the fireproofing material can provide effective insulation against heat without compromising the structural integrity of the truss or its performance under fire conditions.

Choosing 60 mils as the maximum thickness is based on industry standards and testing results, which have demonstrated that this thickness strikes a balance between providing sufficient fire resistance and maintaining proper application practices. Thicker applications may lead to issues such as cracking or detachment, which could reduce the fireproofing effectiveness. Thus, the selection of 60 mils reflects an understanding of both the physical properties of the fireproofing material and the performance requirements necessary to protect structural elements in the event of a fire.