The Encyclopedia Of Wood by U.S. Department of Agriculture

Author:U.S. Department of Agriculture
Language: eng
Format: epub
Publisher: Skyhorse Publishing, Inc.
Published: 2011-01-27T16:00:00+00:00

The moisture content of lumber can be determined by sampling from the lumber supply and using a moisture meter. Alternatively, most manufacturers use a continuous in-line moisture meter to check the moisture content of each piece of lumber as it enters the manufacturing process. Pieces with greater than a given moisture level are removed and redried.

Grading standards published by the regional lumber grading associations describe the characteristics that are permitted in various grades of lumber. Manufacturing standards for glulam timber describe the combination of lumber grades necessary for specific design values (AITC 117) (AITC 1993b). Two types of lumber grading are used for laminating: visual grading and E-rating.

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