Specialised Branches of the Trade

Abstract

The word ‘plywood’ generally covers the following products.

• (1) Plywood. A composite sheet material manufactured from veneers of wood arranged with the grain of adjacent layers running at right angles.

• (2) Laminboard, sometimes known as laminated board. Here the centre core of the composite material is made of thin strips of wood not exceeding 7 mm wide glued to each other and laid at right angles to the grain of the outer layers or plies.

• (3) Blockboard. A composite material of similar construction but where the centre core consists of blocks of wood not exceeding 25 mm wide.

• (4) Battenboard. Again a similar construction of board but with battens of wood up to 75 mm wide as a core. This is known in America as lumber core.