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ICC-ES AC124 – Acceptance Criteria for Rim Board Products


ICC-ES AC124 establishes the acceptance criteria for rim board products used in wood-framed construction to be evaluated in an ICC-ES evaluation report under the International Building Code (IBC) and the International Residential Code (IRC).

In simpler terms, it outlines the requirements for rim boards, which are structural components used to support the edges of floors and roofs in wood-framed buildings. These criteria ensure that the products meet specific standards for strength, durability, and performance to contribute to the overall structural integrity and safety of buildings.

Key aspects covered by ICC-ES AC124 include:

  • Materials: specifies the types of materials allowed for rim boards (e.g., wood, composite).
  • Dimensions and tolerances: outlines the specific measurements and acceptable variations for rim board dimensions.
  • Performance requirements: establishes minimum standards for strength, stiffness, and resistance to moisture and decay.
  • Testing procedures: details the methods for evaluating the performance of rim boards under various conditions, ensuring they can withstand the stresses and environmental factors they will encounter in real-world applications.

By adhering to ICC-ES AC124, manufacturers can ensure their rim board products are suitable for use in wood-framed construction and meet the requirements of building codes. This helps ensure the structural integrity and safety of buildings.

ICC-ES AC124 Accredited Inspection Agency

Applied Testing & Geosciences, LLC is accredited for performing inspections using the ICC-ES AC124 acceptance criteria.

Contact us for more information.



rim board; wood-framed construction; strength; stiffness; moisture resistance; decay resistance; dimensions; tolerances; testing