Features of plywood Plywood in Asiawood The average density of plywood is 600 700 kg/m3. Common plywood size: 1220 x 2440 mm; 1160 x 2440 mm; 1000 x 2000 mm. Common plywood thickness: 3, 4, 5, 6, 8, 10, 12, 15, 18, 20, 25 (mm). The layers of a plywood board are always odd (3, 5, 7, 9â?¦) so that the board has a core layer in the middle, in order to create the same grain direction in the two outer layers of the core layer. From there, these layers of wood restrain each other from warping or cracking. As a result, the thin layers on either side of the core layer that are tightly held by the core layer cannot expand freely. It is because of this arrangement of layers that plywood does not warp and shrink under normal conditions.
