The shaped framing for kidney-shaped writing tables and similar classes of work is built up by laminating pieces of 3⁄4-in. or 1-in. wood, after which the face side is veneered so as to hide the glued joints. [Fig. 341] shows a sketch of one quarter of an elliptical table frame levelled up and ready for applying the veneer.
Lamination.—If we apply to the dictionary for the word "lamination," we find that lamellar structure is the arrangements in thin plates or layers one over the other, usually having the end joints alternating, and it is a condition which allows of cleavage in one direction only. This method is used for nearly all descriptions of free or irregular curves, such as sweeps, bends, ogee shapes, and segments of circles. The timber is marked out in suitable lengths, rough-sawn and then planed true on the face, glued together, and when set the sides are cleaned up to the required shape. It is one of the strongest methods of construction, and necessarily costly. Pulleys, pulley rims, and a hundred and one other jobs are built by this method.
[Fig. 342] shows one half of a core box built by this method, ready to be worked to the required shape.
MISCELLANEOUS JOINTS
Weather boards.—For outdoor buildings, such as garages, garden sheds, toolhouses, etc., "weatherboarding" is often preferred to ordinary matchboarding, chiefly because of the facility with which it throws off the rain. The boarding can be bought ready prepared. Three methods of jointing are shown in the sections at [Fig. 343]. The method indicated at A shows one of the most satisfactory types, its boards being planed and moulded as shown. The other two examples are more common. The boarding at B is rebated, whilst at C each board overhangs its lower neighbour. The boards for C and D are always cut tapered as indicated.
| Fig. 343.— Weather Boards. | Fig. 344.—Ladder Rungs. |
The end grain is usually protected by nailing on a strip of timber, chamfered on both edges.
Ladders.—[Fig. 344] illustrates the method of fastening the rung (or stave) of a ladder to the side. At A the common method is shown, the stave being simply driven into the hole and wedged. At B a much better but more expensive method of construction is given. The stave here is socketed and the pin turned to a smaller diameter. In both cases the rung, or stave, is painted before being driven into the side and wedged.
| Fig. 345.—Cornice Pole Joint. | Fig. 346.—Veneer Keying. |