DISCUSSION
Exercise:
1. Cedar (c) has a high resistance to decay. It is used as a liner for closets, cedar chests, etc., because of its moth
repellant action.
Lap (a) joints are used by the carpenter or cabinetmaker to connect crossrails to the sides of cabinets.
2.
3. Dado (b) joints are actually grooved joints with the groove running across the grain of the wood. They are used
extensively in cabinet-drawer construction.
For rough knockdown or outside furniture, the tenon can be cut longer than the depth of the mortise, with a hole
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driven in the protruding part. This is called keyed mortise and tenon (a) joint.
5. Stool (b) construction is really four frames put together to form a rectangle or square. It is used for tables, chairs
and stands.
When quartersawed, the medullary rays of oak (d) grain are broad and numerous, making pleasing patterns.
6.
7. Grooved (a) joints have the groove, or plow as it s sometimes called, running with the grain of the wood. They
are used extensively in panel construction.
8 To determine the proper thickness of a tenon, compare it with the member of which it will be a part. The tenon
thickness should be about one-third the thickness (d) of the member.
Often tops are large enough to require two or more pieces to be glued together. The method of fastening them to
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the furniture is important because of the swelling and shrinking (a) of tops.
Redwood (c) holds paint exceptionally well, shrinks very little, and keeps its shape. It is used for garden furniture.
10.
These qualities make it best choice for the exposed locations of the shuttle bus stops.
Before you assemble the unit into final form, you must make a preassembly check by checking each piece for
11.
dimensions, shape, and fit (a).
Hardwood is graded as follows: first (b), second, select, No. 1 common, No. 2 common, and No. 3 common.
12.
13.
The miter (b) joint can be fastened with glue and metal fasteners. It is a diagonal joint and it is used extensively
for frames and moldings.
The size of the dowel should be large enough to support the intended job without weakening it. The diameter
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should be approximately one-third to 1 (c) the thickness of the stock on which it is being used.
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