When metal lath is used for SFRM application, it must weigh at least how many pounds per cubic yard?

Get ready for the Special Inspector (SI) Certifications Fireproofing Exam with our comprehensive quiz. Enhance your preparedness with detailed questions, hints, and explanations. Ace your certification!

Multiple Choice

When metal lath is used for SFRM application, it must weigh at least how many pounds per cubic yard?

Metal lath provides reinforcement and a mechanical key for SFRM, so its mass per volume helps the cementitious coating grip the surface and stay in place through application, curing, and fire exposure. Setting a minimum weight ensures there is enough reinforcement to carry stresses within the SFRM and to prevent cracking, delamination, or sagging of the coating. The specified threshold comes from performance criteria for these systems, and using lath at or above this density gives reliable bonding and integrity of the fireproofing layer. Therefore, the minimum weight required is 1.7 pounds per cubic yard.

Metal lath provides reinforcement and a mechanical key for SFRM, so its mass per volume helps the cementitious coating grip the surface and stay in place through application, curing, and fire exposure. Setting a minimum weight ensures there is enough reinforcement to carry stresses within the SFRM and to prevent cracking, delamination, or sagging of the coating. The specified threshold comes from performance criteria for these systems, and using lath at or above this density gives reliable bonding and integrity of the fireproofing layer. Therefore, the minimum weight required is 1.7 pounds per cubic yard.

More practice questions