Plywood is pieces of wood made of three or more layers of veneer joined with glue and usually laid with the grain of adjoining plies at right angles. Almost always an odd number of plies are used to provide balanced construction. Some of the major structural uses for plywood are:

1. Roof, floor, and wall sheathing;

2. Horizontal and vertical diaphragms (shear wall);

3. Structural components (Laminated Veneer Lumber);

4. Gusset plates; and

5. Concrete Formwork.

Plywood Type

1. Exterior Plywood

2. Film Faced Plywood (Formwork)

3. Packing Plywood

4. Structural Plywood

5. Anti Slip Plywood

6. Container Flooring Plywood

7. Interior Plywood

8. Commercial Plywood

9. Fancy Plywood

10. Furniture Plywood

A thin sheet of wood obtained from the peeler log is called veneer or ply. The cross-laminated pieces of wood in a plywood panel are known as layers.  A layer is often an individual ply, but it can consist of more than one ply. The face and back plies have the grain running parallel to the 8-ft dimension of the panel. (Note: wood is stronger parallel to the grain than perpendicular to the grain).