What is the bond strength of SFRM if the test cap area is 0.0576 square feet and the force at failure is 15 pounds?

To determine the bond strength of Spray Fire-Resistive Material (SFRM), one must use the formula that calculates bond strength by dividing the force applied at failure by the area of the test cap. In this case, the force at failure is 15 pounds, and the test cap area is 0.0576 square feet.

The bond strength is calculated as follows:

Bond strength (psf) = Force (pounds) / Area (square feet)

By plugging in the values:

Bond strength = 15 pounds / 0.0576 square feet = 260.42 psf

This rounds to approximately 260 psf. Therefore, the bond strength of SFRM, given the specific conditions of the test, is correctly identified as 260 psf. This value reflects the material's effectiveness in maintaining its bond under a specified load, which is a crucial aspect of its performance in structural fireproofing applications. Understanding these calculations is essential for ensuring safety and compliance in fire protection measures.