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ICC-ES AC233 – Acceptance Criteria for Dowel-type Threaded Fasteners Used in Wood


ICC-ES AC233 establishes the requirements for dowel-type threaded fasteners used in wood construction to be recognized in an ICC-ES evaluation report under the International Building Code (IBC) and the International Residential Code (IRC).

The scope of AC233 covers:

  • Materials: specifies acceptable materials for dowel-type threaded fasteners, including steel, stainless steel, and other corrosion-resistant materials.
  • Design and dimensions: details requirements for fastener dimensions, thread configurations, and head styles.
  • Performance: outlines performance criteria for fasteners, including tensile strength, shear strength, pull-out resistance, and embedment strength.
  • Testing: describes the testing procedures used to evaluate fastener performance according to the applicable standards.

By defining these criteria, AC233 ensures that dowel-type threaded fasteners used in wood construction meet the necessary standards for safety, reliability, and compliance with building codes. It provides confidence to building officials, designers, and consumers that these fasteners are suitable for their intended applications.

ICC-ES AC233 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing inspections and tests using the ICC-ES AC233 acceptance criteria (section 4.0).

Contact us for more information.



dowel; threaded fastener; wood; tensile strength; shear strength; pull-out resistance; embedment strength; steel; stainless steel; corrosion resistance; building code