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ICC-ES AC345 – Acceptance Criteria for Stay-in-place Forms for Post and Beam Concrete Walls with Jobsite-applied Exterior Finish Systems


ICC-ES AC345 establishes the requirements for stay-in-place forms for post and beam concrete walls with jobsite-applied exterior finish systems, to be recognized in an ICC-ES evaluation report under the International Building Code (IBC) and the International Residential Code (IRC).

The scope of AC345 includes:

  • Materials: it specifies acceptable materials for the stay-in-place forms, including their structural, thermal, and moisture resistance properties.
  • Design and construction: it outlines the design and construction requirements for the forms, including their dimensions, connections, and fastening methods.
  • Performance: it defines performance criteria that the forms must meet, such as structural strength, thermal resistance, and resistance to moisture penetration.
  • Testing: it details the testing procedures used to evaluate the performance of the forms, including structural, thermal, and moisture resistance tests.
  • Compatibility with exterior finishes: it also addresses the compatibility of the forms with various jobsite-applied exterior finish systems.

By defining these criteria, AC345 ensures that stay-in-place forms for post and beam concrete walls meet the necessary standards for safety, performance, and compatibility with exterior finishes. This provides confidence to building officials, designers, and contractors that these forms are suitable for use in construction projects.

ICC-ES AC345 Accredited Inspection Agency

Applied Testing & Geosciences, LLC is accredited for performing inspections using the ICC-ES AC345 acceptance criteria.

Contact us for more information.



stay-in-place form; concrete wall; post and beam; exterior finish system; structural strength; thermal resistance; moisture resistance