Knowledge of joining wood will allow you to design and construct customized shelving or other forms of storage. Understanding how to make common woodworking joints will also enable you to carry out repair jobs on items such as doors, windows, stairs, kitchen cabinets, and other furniture. Choosing which joint to use in any situation involves weighing strength, looks, and ease of construction. Biscuit joiners give the option of easily making joints.
Choosing a Suitable Joint
The complexity of any joint is determined by the strength and quality of finish required. joints hidden from view do not need to be decorative, and a butt joint will usually do.
Some joints are made for strength: for example, a lap joint is much stronger than a butt joint, and a mortise-and-tenon joint is stronger still. Your skills and experience may also affect your choice of which joint to use.
To make these simple joints you need only be able to measure lengths accurately, and make clean, straight cuts. Nails or screws should be slightly angled so that they cannot pull apart. Butt joints are commonly used in hidden frameworks such as stud walls.
A lap joint is stronger than a butt joint. Each piece of lumber has half its depth removed so that it overlaps and interlocks with the other piece. A cross-lap joint (see below) creates a cross or T-junction rather than a right angle. For both, accuracy in measuring and marking up is essential.
MAKING A LAP JOINT
A. Use a marking gauge to make identical cutting guides on each section of lumber to be joined.
B. Cut a rabbet with a circular or tenon saw, making the cuts first across the grain, and then along the grain.
C. Attach the joint as required; screws are used here. Use wood glue as well if you want extra strength.
MAKING A CROSS-LAP JOINT
A. Mark the dimensions and position of the joint. Make several cuts across the grain, to the required depth, in the marked area.
B. Chisel away the waste wood from between the cuts, working slowly and carefully.
C. Slot the two notched lengths of wood together. Attach them with wood glue and/or nails or screws.
HOUSING AND RABBET JOINTS
These two joints are useful for cabinet and shelving construction. Both are easiest achieved with a router, a power tool that cuts a rabbet to a set size.
MAKING A MORTISE-AND-TENON JOINT
Mortise-and-tenon joints join pieces of wood very strongly and cleanly. The end of one length of lumber is cut away on two, or all four, sides to make a peg. A peg-sized hole is then cut out of another piece of wood, and the peg is inserted. Joints connecting the stiles of doors with the rails are often made in this way.
A. Mark the cuts needed for the peg and slot on two lengths of lumber. Cut the peg with the wood grain as shown for a lap joint.
B. Drill overlapping holes to the depth required for the slot with a flat bit. Remove as much of the waste wood as possible with the bit.
C. Neaten the edges of the slot hole using a hammer and chisel.
D. Insert the peg into the slot to check the fit. Then apply wood glue to the inside of the slot, and make the joint.
JOINT BRACKETS AND BLOCKS
There are a number of plates that can be used to repair existing wooden joints, or create new joints. To attach a bracket or block flush to wood, draw around it, and use a chisel and hammer to create a shallow rabbet.
This page was last modified on: Wednesday, 2016-06-22 13:28 PST; 2007-10-22 3:42