The Canadian Wood Council is proud to share the National Lumber Grades Authority (NLGA) latest updates to the design values for Hem-Fir (N) dimension lumber, effective April 1, 2025. These changes result from a routine reassessment of strength and stiffness properties, ensuring Hem-Fir (N) continues to meet structural performance expectations.
Key Points:
- Minimal Practical Impact: The updated design values should not result in significant changes to the practical use of Hem-Fir (N) in most applications, maintaining continuity for builders, designers, and engineers.
- Consistent Performance: Hem-Fir (N) remains a trusted and dependable choice for residential and commercial construction, with values that closely align with previous standards.
- No Impact on Existing Construction: Structures built under previous building codes remain compliant.
- The updates are reflected in the NLGA Standard Grading Rules for Canadian Lumber, CSA O86 – Engineering Design in Wood, and the National Design Specification® (NDS®) Supplement for Wood Construction.
For additional details, including specific design value changes, affected lumber grades, and implementation considerations, please refer to the Frequently Asked Questions (FAQ) document for Canada or the USA.
Download publication by Region:
