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Wood Joints

There are many kinds of joints used to connect wood stock. Each joint has a definite use and required marking, cutting and joining together. The strength of the joint depends on the amount of contact area. If a particular joint does not have much contact area, then it must be reinforced with nails, screws or dowels.

Lap Joint:

 Also called halving joint. The aim of this joint is to secure the corners and intersections of the framing and at the same time in the same plane. They may be usefully employed in many types of framing where strength and appearance are of secondary consideration.

Mortise and Tenon Joint:

This family of joints is a large one and does probably the wood worker use the commonest. It consists of a rectangular peg (tenon) fitting into a rectangular hole (mortise).

Briddle Joint: 

These are the reverse of mortise and tenon joints in form and are often called the open mortise tenon. These joints are used where the members are of square or nearsquare or near-square section and thus unsuitable for making a mortise and tenon joint of good proportions.
Instructions
  1. When you are using your thumb as a guide for cross cutting and ripping, raise it sufficiently high.
  2. Planing should be done along grains only.
  3. Push the chisel away from you while chiseling.
  4. Always use marking gauge (or) a mortise gauge for drawing lines.
  5. Check the squareness of planned surfaces with try square.
  6. Use wooden mallets for driving chisel.
  7. Do not test sharpness of the edge of the cutting tools on your hand.
  8. Do not keep your hands In front of the sharp edged tools while they are in use.
  9. Only un wanted material should be removed.


Safety Precautions :

General : Make sure that your hands are not in front of sharp edged tools while you are using them.

 Saws : Be careful when you are using your thumb as a guide in cross cutting.

 Chisels :
1. Never chisel towards any part of the body.
2. Test the sharpness of the cutting edge on wood or paper, not on your hand.



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