Ply Wood
Plywood is a
manufactured wood panel made from thin sheets of wood veneer. It is one of the
most widely used wood products. It is flexible, inexpensive, workable,
re-usable, and can usually be locally manufactured. Plywood is used instead of
plain wood because of its resistance to cracking, shrinkage, splitting, and
twisting/warping, and its general high degree of strength. Plywood layers
(called veneers) are glued together with adjacent plies having their wood grain
at right angles to each other. Cross-graining has several important benefits:
it reduces the tendency of wood to split when nailed at the edges, it reduces
expansion and shrinkage equating to improved dimensional stability, and it
makes the strength of the panel consistent across both directions.
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