ICC-ES AC23
Full Name
ICC-ES AC23 – Acceptance Criteria for Sprayed Fire-resistant Materials (SFRMs), Intumescent Fire-resistant Coatings and Mastic Fire-resistant Coatings Used to Protect Structural Steel MembersScope
ICC-ES AC23 outlines the requirements and test procedures for evaluating the performance of fire-resistant materials (FRMs) applied to structural steel members. The scope of AC23 includes:- Material evaluation: assessing the physical and chemical properties of FRMs, such as adhesion, density, and thickness.
- Fire resistance testing: conducting standardized fire tests to determine the fire resistance rating of the FRM-protected steel assembly. This rating indicates how long the assembly can withstand fire exposure before failure.
- Durability testing: evaluating the durability of FRMs under various environmental conditions, such as moisture, temperature fluctuations, and impact.
- Quality control: establishing quality control measures for manufacturers to ensure consistent product quality and performance.
- Installation requirements: providing guidelines for the proper application of FRMs to ensure optimal fire protection.
- Sprayed fire-resistive materials (SFRMs): these materials are applied by spraying onto the steel surface to form a protective layer that insulates the steel from heat during a fire.
- Intumescent fire-resistive coatings: these coatings expand and char when exposed to high temperatures, creating a protective layer that insulates the steel.
- Mastic fire-resistive coatings: these thick coatings are troweled onto the steel surface and provide insulation through a combination of thermal and chemical reactions.