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Download ANSI/APA PRG 320-2025: Standard for Performance-Rated Cross-Laminated Timber, the current version of the approved standard.
This standard covers the manufacturing, qualification, and quality assurance requirements for cross-laminated timber (CLT).
ANSI/APA PRG 320 Committee Members
View the ANSI/APA PRG 320-2025 Committee Membership Roster.
Historic Versions
Click on the title to download document below.
Active Ballot
There is no active ballot available to download at this time.
Standard Interpretation
December 3, 2018
PRG 320 interpretation regarding adhesives, temperature and assembly time
Archival Information
Final Ballot for ANSI/APA PRG 320-2025
December 2024