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The Central Committee on Lumber Standards was started in 1922 by Herbert Hoover when he was U.S. Secretary of Commerce at the request of the lumber industry. [4] Chaired by John W. Blodgett, the Central Committee was intended to be a way to create voluntary lumber standards without imposing formal government regulations, in order to solve the problem of lumber manufacturers selling lumber that ...
Grades standardize the quality of lumber at different levels and are based on moisture content, size, and manufacture at the time of grading, shipping, and unloading by the buyer. The National Lumber Grades Authority (NLGA) [ 19 ] is responsible for writing, interpreting and maintaining Canadian lumber grading rules and standards.
Black spruce stand at Arctic Chalet, Inuvik, NT Spruce-pine-fir (SPF) is a classification of lumber that can be traded on commodities exchanges.. In Canada, and parts of the United States, most of the spruce tree species, pine tree species, and fir tree species share similar physical and mechanical characteristics, to the point where lumber derived from any of these species are interchangeable ...
When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...
The Log Scaler measures the cut trees to determine the scale (volume) and quality (grade) of the wood to be used for manufacturing. When logs are sold, in order to determine the basis for a sale price in a standard way, the logs are "scaled" which means they are measured, identified as to species, and deductions for defects assigned to produce ...
The National Hardwood Lumber Association (NHLA) was founded on April 8, 1898 in Chicago, Illinois to establish uniformity of inspecting hardwood lumber.The NHLA is now a membership-based trade association that serves two main purposes: to stimulate economic activity and to provide a vehicle for the members to collectively strive for mutual benefit.
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