What is the square area of the test area when testing SFRM thickness on a deck?

The square area of the test area when testing Spray-Applied Fire-Resistive Materials (SFRM) thickness on a deck is typically defined as 144 square inches. This is because the area is commonly specified as a square with each side measuring 12 inches, which results in 12 inches x 12 inches = 144 square inches. Understanding how to measure and document the thickness of SFRM is critical for ensuring that it meets fire protection requirements. An accurate determination of the thickness over a standardized area helps in assessing the effectiveness and compliance of the fireproofing application.