APA - The Engineered Wood Association

Standard for Performance Rated Cross-Laminated Timber PRG 320

This standard covers the manufacturing, qualification, and quality assurance requirements for cross-laminated timber (CLT). The current version of the approved standard ANSI/APA PRG 320-2012: Standard for Performance-Rated Cross-Laminated Timber can now be downloaded free in PDF format. The previous version of the standard, ANSI/APA PRG 320-2011, which has been adopted by the 2015 International Building Code (IBC), is also available for download.


Membership for APA Standards Committee on PRG 320

Download a PDF of the Committee Membership Roster. Are you interested in becoming part of this committee? Download the Application Form.


Archived Committee Ballot Information


Archived Committee Meeting Information

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Operating Procedures

Read the operating procedures for development of APA consensus standards.