What is the minimum size for an SFRM density test sample?

The minimum size for a Spray-Applied Fire-Resistive Material (SFRM) density test sample is 8 cubic inches. This size is specified in industry standards to ensure that the sample is sufficiently large to provide an accurate representation of the material's density. The density of SFRM is critical for evaluating its performance under fire conditions, as it directly influences thermal resistance and the material's ability to protect structural elements.

When conducting density tests, having a sample that is too small could result in misleading data due to potential variations in the material application or inconsistencies within the sample itself. An 8 cubic inch sample strikes a balance between being manageable in size while still providing reliable test results that can inform safety and compliance assessments for fireproofing materials. Therefore, adhering to this minimum size requirement is essential for maintaining the integrity of fireproofing applications in construction.