Effect of Green Lumber Framing on Wood Structural Panel Shear Wall Performance

Green lumber framing is commonly used in shear wall construction across various regions, but questions persist about whether wet-service adjustment factors should apply when this high-moisture-content lumber (MC > 19%) dries in service.

This publication is designed for: engineers, builders, designers

This publication presents findings from APA's comprehensive test series involving eight shear walls constructed under varying conditions. Six walls were built with green framing and tested after drying, while two control walls used dry lumber throughout. The testing examined three hold-down configurations to simulate potential shrinkage effects, providing practical insights into real-world construction scenarios.

Key sections include:

• Green lumber usage and moisture content effects

• Test methodology comparing green-built versus dry-built assemblies

• Recommendations based on test results

• References to NDS and SPDWS design provisions

Published by APA — The Engineered Wood Association.