How many total SFRM thickness measurements are required on a joist?

For determining the required thickness measurements of Spray-Applied Fire-Resistive Materials (SFRM) on a joist, it is important to adhere to industry standards and best practices. The correct number of thickness measurements is crucial for ensuring the effectiveness of the fireproofing material applied to structural components.

The specification of 14 total thickness measurements ensures that there is a comprehensive assessment of the fireproofing material’s application across the surface area of the joist. The measurements should be taken at specific intervals and locations to account for potential variations in application thickness, which can occur due to different factors such as application techniques or equipment used.

Taking 14 measurements allows for a representative sampling of the overall thickness and helps to identify any inconsistencies that may affect the fire resistance performance of the joist. This thorough approach plays a significant role in meeting fire safety standards and ensuring that the structural integrity is maintained during a fire event.

Fewer measurements, like those suggested by the other choices, may not provide sufficient coverage or accuracy in assessing the thickness of the fireproofing material, potentially resulting in inadequate fire protection. Hence, 14 measurements are aligned with established codes and guidelines for SFRM applications.