. Cyclopedia of architecture, carpentry, and building; a general reference work ... Fig. 82. Single Tenon Joint withTwo Tenons Fig. 83. Double Tenon Joint withFour Tenons strong hold on them. Fig. 84 shows this arrangement both in ele-vation and in section. It is useful in making up large panels fromnarrow boards. In this method, only one of the pieces must be gluedto the strip, the others being left free to move. Another method of accomplishing this same result is by the useof a strip which sets against the back of the pieces to be joined, butis not let into them at all. Fig. 85. It is held i
. Cyclopedia of architecture, carpentry, and building; a general reference work ... Fig. 82. Single Tenon Joint withTwo Tenons Fig. 83. Double Tenon Joint withFour Tenons strong hold on them. Fig. 84 shows this arrangement both in ele-vation and in section. It is useful in making up large panels fromnarrow boards. In this method, only one of the pieces must be gluedto the strip, the others being left free to move. Another method of accomplishing this same result is by the useof a strip which sets against the back of the pieces to be joined, butis not let into them at all. Fig. 85. It is held in place by means ofscrews which go through slotted holes in the strip. This is in orderthat the pieces may have a chance to swell or shrink without bulg-ing or splitting. It is usually customary to employ brass slotswhich are let into the wood. These resist much better the wear of 77 68 CARPENTRY the screws and prevent them from working loose. If, however, thestrip is of very hard wood this is not always necessary. A third method is that shown in Fig. 86. This is sometimescalled
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