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When boards are cut from a log, they are usually rip cut along the length (axis) of the log. This can be done in three ways: plain-sawing (most common, also known as flat-sawn, bastard-sawn, through and through, and tangent-sawn), quarter-sawing (less common), or rift sawing (rare).
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The AWI defines "rift sawing" as a technique of cutting boards from logs so the grain is between 30–60° to the face of the board, with 45 degrees being "optimum". [2] In Understanding Wood , Hoadley describes "rift grain" as occurring at an angle between 45–90° to the surface, and describes the AWI definition as "bastard sawn".
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Wood grain is the longitudinal arrangement of wood fibers [1] or the pattern resulting from such an arrangement. [2] R. Bruce Hoadley wrote that grain is a "confusingly versatile term" with numerous different uses, including the direction of the wood cells (e.g., straight grain, spiral grain), surface appearance or figure, growth-ring placement (e.g., vertical grain), plane of the cut (e.g ...
End grain sealers are liquid products usually containing wax which helps prevent rapid drying of the ends of lumber resulting in splits. Metal end plates or S-shaped pieces of metal may be driven into the butt ends of a timber. Splitting is the primary reason building codes do not allow notching in the bottom of joists and beams.
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Two cuts on each flitch trim the bark from the sides, and reduces it to a standard board width with squared edges. Two more cuts at each end set the length. Lumber can be quickly flat-cut with a side-by-side set of mechanical saws. [3] A slower but sturdier method involves passing the log back and forth over a single saw.