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As previously noted, less wood is needed to produce a given finished size than when standards called for the green lumber to be the full nominal dimension. However, even the dimensions for finished lumber of a given nominal size have changed over time. In 1910, a typical finished 1-inch (25 mm) board was 13 ⁄ 16 in (21 mm). In 1928, that was ...
An example of planed lumber is softwood "two by four" lumber sold by large lumber retailers, nominally 2 by 4 inches (50 mm × 100 mm). The 2 × 4 is actually only 1 + 1 ⁄ 2 in × 3 + 1 ⁄ 2 in (38 mm × 89 mm), but the dimensions for the lumber when purchased wholesale could still be represented as full 2 × 4 lumber, although the "standard ...
e. The history of the lumber industry in the United States spans from the precolonial period of British timber speculation, subsequent British colonization, and American development into the twenty-first century. Following the near eradication of domestic timber on the British Isles, the abundance of old-growth forests in the New World posed an ...
A flat and straight length of some material, usually wood, steel or aluminium, which provides a reference for tools to work against, or which prevents the work from sliding. fiber. Also spelled fibre. The fine tube-like structure of wood which is hollow and determines the grain direction. figure.
Timber design or wood design is a subcategory of structural engineering that focuses on the engineering of wood structures. Timber is classified by tree species (e.g., southern pine, douglas fir, etc.) and its strength is graded using numerous coefficients that correspond to the number of knots, the moisture content, the temperature, the grain ...
Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the ...
A method for logs over 19 in (48 cm) Quarter sawing or quartersawing is a woodworking process that produces quarter-sawn or quarter-cut boards in the rip cutting of logs into lumber. The resulting lumber can also be called radially-sawn or simply quartered. There is widespread confusion between the terms rift sawn and quarter sawn with the ...
Spruce-pine-fir. 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 ...
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