What type of material is typically utilized for mechanical breaks in SFRM applications when avoiding metal lath?

In SFRM (Sprayed Fire-Resistive Materials) applications, mechanical breaks are essential for maintaining the structural integrity of fireproofing systems. Utilizing 12-gauge steel studs for these breaks is a common practice due to their strength and durability. Steel studs provide a reliable framework that can withstand the stresses of building movements and fire conditions without compromising the effectiveness of the fire-resistive materials.

By avoiding metal lath, which can be prone to corrosion and may not offer the same structural benefits in certain environments, the use of steel studs ensures a high level of performance and longevity for the fireproofing system. Steel also has the added advantage of being non-combustible, contributing positively to the overall fire-resistance rating of the construction assembly.

Other materials, while potentially useful in some contexts, do not provide the same strength and reliability. Wooden framing can degrade over time and is combustible, making it less suitable for fireproofing applications. Fiberglass strands and plastic composites, although lightweight, may not provide the necessary structural support needed for effective mechanical breaks in SFRM applications. Thus, the choice of 12-gauge steel studs aligns best with industry standards and practices for ensuring the integrity of fireproofing systems.