How many SFRM thickness tests are required under metal decking measuring 6,500 square feet?

The correct answer is derived from the guidelines established for Spray-Applied Fire-Resistive Materials (SFRM) thickness testing, which specify the number of tests based on the area of application. For an area of 6,500 square feet, the testing requirements often follow a standard that mandates a certain number of thickness tests to ensure compliance with fire-resistance ratings.

In this context, the requirement for testing includes a base number of tests for the first segment of the area and then additional tests for each subsequent area up to a specified threshold. For an area of 6,500 square feet, the calculations used by professionals typically indicate that seven thickness tests are necessary to adequately assess the application and confirm that the SFRM meets the specified thickness for fire-resistance performance. This process is crucial to maintain fire safety standards and ensure that structures can withstand fire exposure for the intended duration as outlined in building codes and regulations.

Thus, the regulations and industry practices dictate that for an area of this size, seven tests are optimal to achieve reliable results.