Figure 2: Engineered wood production volume in North America as compared to the publication year of the ASTM standards. The ratio of 1 represents 172 million board feet (405,600 m3) in 1982 for glulam (production volumes between 1978 and 1982 are unavailable); 135 million linear feet (41 million meters) in 1990 for I-joists; and 21 million cubic feet (594,700 m3) in 1993 for LVL. (Data source: APA – The Engineered Wood Association. PSL, LSL, and OSL data are unavailable.)

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