For a W-shaped column with a specified SFRM thickness of 1-7/16 inch, are the measurements of 1-3/16 inch and 1-1/4 inch acceptable if the others exceed the specified thickness?

The question revolves around the acceptance criteria for the thickness of Spray Fire-Resistive Material (SFRM) applied to a structural column. The specified SFRM thickness is 1-7/16 inches. When assessing the various measurements, it is important to note that as long as the overall fireproofing adheres to the prescribed thickness and provides adequate protection, deviations in the individual measurements may be acceptable, provided they do not collectively undermine the intended performance.

In this case, if the measurements of 1-3/16 inch and 1-1/4 inch are taken from various sections of the column, and the other measurements exceed the specified requirement of 1-7/16 inches, this indicates that the overall coverage fulfills the fire resistance goals. The performance of SFRM is typically evaluated on average thicknesses or overall performance rather than solely individual measurements. Thus, as long as the twisting points of measurement and the general behavior of the material meet the fire performance requirement, the acceptance is justified.

This rationale supports the idea that even if individual measurements fall slightly short, they can be acceptable as long as the remaining thicknesses compensate, ensuring that the SFRM still fulfills its protective role effectively. Therefore, it's concluded that