Supplement No. 1 for the 2025 WWPA Western Lumber Grading Rules is now available for download from the WWPA website. The supplement contains changes for a new footnote to the timber design values tables, Table 2 BEAMS & STRINGERS, Table 3 POSTS & TIMBERS, and a new Table 4 SPECIFIC GRAVITY, providing a new 0.40 value for SPFs, Spruce-Pine-Fir (south), increased from 0.36. To download the supplement, visit the WWPA website at www.wwpa.org. Registration is required.

Hard copies of the supplement will be made available in the next two weeks. To order hard copies of Supplement No. 1, email WWPA Production Associate, Von Porter, at vporter@wwpa.org.

WWPA Members can also download the supplement from the Members Only site. A company email is required. Click here to register.