Plywood

Plywood is a manufactured wood panel from the family of manufactured boards (such as medium-density fibreboard (MDF), particle board (chipboard), etc.) made from thin sheets of wood veneer. Plywood layers (called veneers or plies) are glued together, with adjacent plies having their wood grain rotated relative to adjacent layers up to 90 degrees.


All plywoods bind resin and wood fiber sheets (cellulose cells are long, strong and thin) to form a composite material. This alternation of the grain is called cross-graining and has several important benefits: it reduces the tendency of wood to split when nailed at the edges; it reduces expansion and shrinkage, providing improved dimensional stability; and it makes the strength of the panel consistent across all directions. There are usually an odd number of plies, so that the sheet is balanced—this reduces warping. Because plywood is bonded with grains running against one another and with an odd number of composite parts, it is very hard to bend it perpendicular to the grain direction of the surface ply.

Thickness (in mm)    :: 3    5    7    9    12    15    18
Size    (in ft)    :: 4' x 8' only
Remarks         :: Prices may vary depending on the daily exchange rate.