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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.
Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...
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Specifically, it refers to lumber cut for industrial or wood-packaging use. Lumber is cut by ripsaw or resaw to create dimensions that are not usually processed by a primary sawmill. Re-sawing is the splitting of 1-to-12-inch (25–305 mm) hardwood or softwood lumber into two or more thinner
Global Wood Density Database; National Hardwood and Lumber Association; American Hardwood Information Center; American Hardwood Export Council; Australian National Association of Forest Industries
In the United States, planks can be any length and are generally a minimum of 2×8 (1 + 1 ⁄ 2 in × 7 + 1 ⁄ 4 in or 38 mm × 184 mm), but planks that are 2×10 (1 + 1 ⁄ 2 in × 9 + 1 ⁄ 4 in or 38 mm × 235 mm) and 2×12 (1 + 1 ⁄ 2 in × 11 + 1 ⁄ 4 in or 38 mm × 286 mm) are more commonly stocked by lumber retailers.
Hardwood from deciduous species, such as oak, normally shows annual growth rings, but these may be absent in some tropical hardwoods. [3] Hardwoods have a more complex structure than softwoods and are often much slower growing as a result. The dominant feature separating "hardwoods" from softwoods is the presence of pores, or vessels. [4]
Solid hardwood is more prone than engineered timber to "gapping" (excessive space between planks), "crowning" (convex curving upwards when humidity increases) and "cupping" (a concave or "dished" appearance of the plank, with the height of the plank along its longer edges being higher than the centre) with increased plank size. Patented ...
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