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• Base Values for Red Alder Lumber

Dimension Lumber (2" to 4" Thick by 2" and Wider) Base Values in pounds per square inch-- Approved by the Board of Review of the American Lumber Standard Committee Use with Appropriate Size and Use-Conditions Adjustments-- Grades described in Western Lumber Grading Rules, Sections 40.00, 41.00, 42.00 and 62.00-- Specific Gravity value based on USDA Wood Handbook 2021--

• Board Footage Table

Available in digital format only: Table for converting lineal feet to board feet for common sizes and lengths of WWPA lumber. Includes formulas for board, surface and lineal measurements along with sample problems. Intended for retailers and contractors. 2 pages.

• California Fire Standards and Exterior Wood Products - Rev. 10

A review of new regulations for building materials used in new structures in California's Wildland Urban Interface (WUI) areas, including a list of species and siding, decking and soffit products that meet the California Building Code Chapter 7A.

• Choices

Among building materials, only one can be considered truly green: wood

• Cleaning Mold on Wood

The decision to clean and remove mold depends on many factors. In general, visible mold growing on surfaces where people may come in contact with it should be cleaned and removed.

• Design Load Tables for Solid-Sawn Lumber Beams and Headers

This Tech Note makes building with lumber beams and headers more user-friendly by providing load tables for single 4x and 6x plus built-up double and triple 2x wood members from 3 to 14 foot spans.

• Design Load Tables for Wood Columns (Posts)

Reviews design loads for simple wood columns from 4x4 up to 12x Western lumber posts. Includes table for incised lumber.

• Design Load Tables For Wood Studwalls Subjected to Wind Pressure

A useful set of design load tables for Douglas Fir-Larch and Hem-Fir lumber according to the 1991 edition of ANSI/AFPA National Design Specification (NDS©) for Wood Construction.

• Design Values and Spans for Alaskan Species Lumber

Design values for Alaska Yellow Cedar, Alaska Hemlock and Alaska Spruce dimension lumber products.

• Design Values for U.S. and Canada Species Group Combinations

Design Values for U.S. and Canada Species Group Combinations

• Douglas Fir - Fast Facts

Technical one sheet with basic facts about Douglas Fir, including structural benefits and dimensional stability.

• Douglas Fir and Western Larch

Provides comprehensive information on Douglas Fir and Western Larch. Describes resources considerations, harvesting, production, attributes, grades, recommended end-uses in structural, appearance, remanufacturing and industrial products. Enhanced with photographs of selected grades and applications. 20 pages

• Hem-Fir & White Fir Fast Facts

Technical sheet on Hem-Fir & White Fir structural benefits.

• Hem-Fir Species Facts

Explains the Western Hemlock/True Firs species combination,growing region, characteristics, grades, physical properties and end-use recommendations for structural, appearance and remanufacturing grades. 20 pages.

• Information on the In-Grade Testing Program, Impacts on Design Values

An overview of the In-Grade Testing program, which yielded new data on the structural performance of softwood lumber and why lumber performs in certain ways.

• Lumber Design Values and Framing Spans

Lumber design values and framing spans for Douglas Fir-Larch, Hem-Fir, Southern Pine and Spruce-Pine-Fir (SPF).

• Lumber Storage

Recommended protection and outside storage procedures for lumber dealers and contractors. 4 pages

• Lumber Storage (Spanish)

Spanish language version of WWPA's Lumber Storage technical sheet. Recommended protection and outside storage procedures for lumber dealers and contractors. 4 pages

• Machine Stress Rated Lumber

Explains what MSR lumber is, how to specify it, quality control procedures and code acceptance information. 7 pages

• Mold, Housing and Wood

Explains why and how mold grows on nearly any material, including wood; steps that can be taken to prevent, control and remove mold; and current scientific information about the health effects of mold. 12 pages. (Revised July 2017)