Plywood Types and its Application

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What is Plywood?

Plywood is a sheet made from thin wooden layers. These thin wooden layers are then glued and machine pressed together to form a sheet. After glueing, these sheets are baked at 140 °C to form a Plywood. It is engineered wood. These wooden layers are processed from Oak, Mahogany, Teak, Maple Bark. There are 5 types of plywood.

Types of Plywood

There are 5 types of Plywood.

Softwood plywood
Hardwood plywood
Tropical plywood
Flexible plywood
Marine plywood

Sizes of Plywood

8’0″ x 4’0″
8’0″ x 3’0″
7’0″ x 4’0″
7’0″ x 3’0″

In INDIA, softwood, flexible & marine Plywood is used on large-scale. Plywood comes not only in different thicknesses but also in different grades.

Grades of Plywood

Grade	Description
A	Face and back veneers practically free from all defects.
A/B	Face veneers practically free from all defects. Reverse veneers with only a few small knots or discolourations.
A/BB	Face as A but reverse side permitting jointed veneers, large knots, plugs, etc.
B	Both side veneers with only a few small knots or discolouration.
B/BB	Face veneers with only a few small knots or discolourations. Reverse side permitting jointed veneers, large knots, plugs, etc.
BB	Both sides permitting jointed veneers, large knots, plugs, etc.
C/D	For structural plywood, this grade means that the face has knots and defects filled in and the reverse may have some that are not filled. Neither face is an appearance grade, nor are they sanded smooth. This grade is often used for sheathing the surfaces of a building prior to being covered with another product like flooring, siding, concrete, or roofing materials.
WG	Guaranteed well glued only. All broken knots plugged.
X	Knots, knotholes, cracks, and all other defects permitted.
WBP	Weather and Boil Proof used in Marine Ply. Designation replaced by EN 314-3.