ICC-ES AC545
Full Name
ICC-ES AC545 – Acceptance Criteria for 5/16-in (8mm) Diameter and Smaller Unreinforced Masonry Screws
Scope
ICC-ES AC545 establishes the structural performance requirements for evaluating 5/16-in (8mm) diameter and smaller unreinforced masonry (URM) screws. These screws are used to attach various elements to URM walls, such as wood ledgers, metal framing, and gypsum wallboard.
The scope of AC545 includes evaluating the following aspects:
- Material properties: assessing the mechanical properties of the screws, including their tensile strength, shear strength, and pullout resistance in different URM substrates.
- Installation requirements: evaluating the installation procedures and tools required for proper installation of the screws in URM substrates.
- Performance testing: conducting tests to evaluate the screw’s performance under various loading conditions, including static, wind, and seismic loads.
- Corrosion resistance: assessing the corrosion resistance of the screws in different environments, including interior and exterior applications.
The primary goal of AC545 is to ensure that 5/16-in (8mm) diameter and smaller unreinforced masonry screws meet the minimum performance standards for structural integrity and safety, as outlined in relevant building codes and standards. By meeting these criteria, manufacturers can obtain an evaluation report from ICC-ES, which can be used to demonstrate code compliance and gain approval for use in construction projects.
Resources
Keywords
unreinforced masonry; screw; diameter; tensile strength; shear strength; pullout resistance; installation; static load; wind load; seismic load; corrosion resistance