When measuring SFRM thickness on tube steel, how many measurements can be under the specified thickness?

In the context of measuring Spray-Applied Fire-Resistive Material (SFRM) thickness on tube steel, the standard generally dictates that there should be no measurements that fall below the specified thickness. This requirement is established to ensure that the fireproofing material provides adequate protection for the structural elements it is applied to. If any measurement is below the specified minimum thickness, it can compromise the effectiveness of the fire protection system and may not meet safety codes or standards.

Therefore, the expectation is that all measured thickness values should meet or exceed the specified requirements to ensure optimal fire resistance and compliance with regulatory standards. This reinforces the necessity for consistent application of SFRM and diligent measurement practices during installation and inspections.