-
Show :
-
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--
-
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 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 Values and Spans for Alaskan Species Lumber
Design values for Alaska Yellow Cedar, Alaska Hemlock and Alaska Spruce dimension lumber products.
-
Design Values for ES-LP MSR Grades of 1650 Fb & Higher
Engelmann Spruce-Lodgepole Pine Machine Stress-Rated (MSR) lumber is not often fully utilized for engineered wood systems. This Tech Note offers a procedure for taking advantage of ES-LP MSR lumber’s high gravity, compression perpendicular-to-grain and horizontal shear design values.
-
Design Values for U.S. and Canada Species Group Combinations
Design Values for U.S. and Canada Species Group Combinations
-
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).
-
Machine Stress Rated Lumber
Explains what MSR lumber is, how to specify it, quality control procedures and code acceptance information. 4pages
-
Redwood Standard Specifications for Grades of California Redwood Lumber 2019
2019 edition of the Standard Specifications for Grades of California Redwood Lumber. <br /> Revised and updated. Changes for Close Grain, Clear Heart Structural, Clear Structural and Wane. These rules are accredited by the American Lumber Standard Committee, Inc., Board of Review.
-
Western Lumber Product Use Manual
Comprehensive technical manual on WWPA lumber products, featuring basic categories of lumber, grades, sizes and species groups, Base Values and adjustment factors for dimension lumber, along with design values for structural decking, MSR lumber, structural-glued products along with posts and timbers. Also includes end-use recommendations and specification guidelines, section properties, relative mechanical properties, appearance lumber grades and sizes and industrial products. 24 page.
-
Western Lumber Size-Adjusted Values
Base Values for WWPA lumber are multiplied by appropriate size-adjustment factors and presented in size-specific design value tables, one table for each of the six species groups for dimension lumber. (Engineers and designers should use Base Values as presented in the Western Lumber Product Use Manual.) 8 pages.
-
Western Lumber Span Tables
Span tables with common loading condition for floor and ceiling jousts and rafters. Calculated in Base Values with size and repetitive member adjustments built in. Available in digital format only. (PDF File)
