In Turkish Plywood means ‘’Kontrplak’’. In our country the Word of Kontrplak commonly uses for ‘’ Filmless Plywood ( Filmsiz Kontrplak), and the Word of Plywood uses for ‘’Filmfaces Plywood ( Filmli Kontrplak). Because of the these two words is so long the Filmfaced Plywood known as just ‘’plywood’’ in construction sector.
The layers are known as ply, product name "plywood" (plywood) takes from this root of the word. In general, the thicker the plywood, the more layers it has.
It has a superior resistant. (Birch Playwood) The strength of the plywood is due to the way in which the layer direction of each layer changes relative to the adjacent layers.
The direction of each layer is usually 90 degrees. This means that there is also an angle of 90 degrees between the other layers. However, the direction may be less than 30 degrees. In a thicker plywood, 7 layers can be arranged consecutively at 0 30 60 90 120 150 and 180 degree angles.