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Rift sawing is a woodworking process that aims to produce lumber that is less vulnerable to distortion than flat-sawn lumber. Rift-sawing may be done strictly along a log's radials—perpendicular to the annular growth ring orientation or wood grain —or as part of the quarter sawing process.
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). In flat sawing , the log is passed through the blade cutting off plank after plank without changing the orientation of the blade or log.
Plywood is a composite material manufactured from thin ... rift sawn or quarter sawn; ... including ash, oak, red oak, birch, maple, mahogany, shorea (often called ...
The types of rip-cuts influence the quality of the lumber. Plain-sawn is the most common type of cut where a log is repeatedly run through a saw and much of the lumber has wood grain nearly parallel to the width of the boards. Quarter sawn and rift-sawn wood is more time consuming and wasteful to produce but is of higher quality.
Quarter sawn and rift sawn – These terms have been confused in history but generally mean lumber sawn so the annual rings are reasonably perpendicular to the sides (not edges) of the lumber. Boxed heart – The pith remains within the timber, post or beam, with some allowance for exposure. Heart center – the center core of a log.
rift sawn Rip-sawing of lumber perpendicular to the grain, often confused with quarter-sawn. ring shake A natural type of split (shake) occurring between the annual growth rings. rip Any cut made parallel to the grain. rip saw route. Also spelled rout. To cut a channel or groove. router