07-22-2014, 05:29 AM
One of the main advantages of plywood is that It has a good strength across as width as along the panel. The more plies there are in a panel, the more nearly equal the strength in both directions will be.
The tendency to swell and shrink is neutralized to a large extent, because in plywood approximately half the wood grain runs in one direction and the other half at the right angles to it.
Plywood cannot be split in the plane of the panel because of its successive layers at right angles to another. Nails and screws can be driven very close to the edge of the panels without danger of splitting.
Plywood can be bent more easily than ordinary wood of the same thickness. The radius of curvature depends on the thickness of the panel an is limited by the strength of the outer piles in tension and by the strength of the inner piles in compression.
![[Image: plyboard1.jpg]](http://www.frontdesk.co.in/big/cm/plyboard1.jpg)
The tendency to swell and shrink is neutralized to a large extent, because in plywood approximately half the wood grain runs in one direction and the other half at the right angles to it.
Plywood cannot be split in the plane of the panel because of its successive layers at right angles to another. Nails and screws can be driven very close to the edge of the panels without danger of splitting.
Plywood can be bent more easily than ordinary wood of the same thickness. The radius of curvature depends on the thickness of the panel an is limited by the strength of the outer piles in tension and by the strength of the inner piles in compression.