How many SFRM thickness tests are required beneath metal decking that covers 6,500 square feet?

When determining the number of thickness tests required for Spray Applied Fire-Resistive Material (SFRM) under metal decking, industry standards and guidelines typically base the number of tests on the area covered. For a coverage area of 6,500 square feet, it’s important to follow the established protocols that recommend testing at specific intervals to ensure adequate fire protection.

In general, the guidelines suggest that for an area up to 10,000 square feet, a specific number of thickness tests must be conducted. The recommendation usually is to conduct one test per 1,000 square feet, but this can vary slightly based on the specific requirements outlined in relevant building codes and standards.

For an area of 6,500 square feet, conducting 7 thickness tests is consistent with the requirement to cover sufficient representation of the area while ensuring that the applied fireproofing achieves the necessary thickness for effective fire resistance. This approach helps ensure accountability and quality control for the fireproofing application, thus safeguarding the structural integrity in the event of a fire.