Cross-Laminated Timber—North American CLT vs. Imported Product

Cross-laminated timber (CLT) manufactured in North America must meet stringent product standards and be certified to the ANSI/APA PRG 320 Standard for Performance-Rated Cross-Laminated Timber. ANSI/APA PRG 320 is recognized in the International Building Code (IBC), International Residential Code (IRC), National Design Specification for wood Construction (NDS) and National Building Code of Canada (NBC). It is important to recognize that products manufactured outside of North America may not meet the performance expectations defined in the standard.

This publication is designed for: builders, designers, engineers, architects

This publication explains what is evaluated in the CLT certification process and explains the implications of accepting alternative CLT products.

Key sections include:

• CLT product description

• APA Trademarked North American CLT

• The difference between North American and imported CLT

  • Design property compatibility

  • Adhesive heat durability

  • Moisture durability

  • Fire performance

• Acceptance of alternative CLT products

Published by APA — The Engineered Wood Association.