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Girard form class is a form quotient calculated as the ratio of diameter inside bark at the top of the first 16 foot log to the diameter outside bark at breast height ().Its purpose is to estimate board-foot volume of whole trees from measurement of DBH, estimation of the number of logs, and estimation of the taper of the first log, based on the general relationships identified between the ...
The board foot or board-foot is a unit of measurement for the volume of lumber in the United States and Canada [1]. It equals the volume of a board that is one foot (30.5 cm) in length, one foot in width, and one inch (2.54 cm) in thickness, or exactly 2.359 737 216 liters. Board foot can be abbreviated as FBM (for "foot, board measure"), BDFT ...
For example, a "2×4" board historically started out as a green, rough board actually 2 by 4 inches (51 mm × 102 mm). After drying and planing, it would be smaller by a nonstandard amount. Today, a "2×4" board starts out as something smaller than 2 inches by 4 inches and not specified by standards, and after drying and planing is minimally 1 ...
A log scaling method that has been popular since the adaptation of trucks to haul logs has been the 'ramp scale'. In this approach, the log truck is driven beside a scale ramp which is simply an elevated platform, and from there the log scaler climbs around on the truck and on the load and measures and grades the logs.
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Annual production in the U.S. is more than 30 billion board feet making the U.S. the largest producer and consumer of lumber. [62] Despite advances in technology and safety awareness, the lumber industry remains one of the most hazardous industries in the world.
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A cord which is made from 4-foot (1.22 m) logs will not be a cord when it has been cut into 1 foot logs and then split so each piece will fit through a 3-inch (7.6 cm) circle. A full cord or bush cord has a volume of 128 cubic feet (3.6 m 3 ), including wood, bark, and air space in a neatly stacked pile. [ 27 ]