SHOT AND GLUED JOINTS

Press, Volume LXXI, Issue 21416, 7 March 1935, Page 3 (Supplement)

SHOT AND GLUED JOINTS

This joint is used when two or more boards are joined together edge-ways to form a large flat surface such as a table top. It is very largely used by joiners, particularly where figured timber has to be matched. To make the joint it is essential that the edges to be joined should be perfectly straight and square. A long plane is used for this purpose, and it is shot along the edge, from one end to the other without stopping, hence the name "shot joint." The method of testing the edge with the square is shown at Fig. 1, while Fig. 2 shows the two pieces ready to go together with a joiner's cramp placed across to hold them until the glue is hard and dry. Notice how two short pieces of timber are placed next to the cramp to prevent it from damaging the work. This joint is very weak, consequently various methods of strengthening are used when necessary. The tongue and groove method is shown at Fig. 3. Here both pieces are grooved to a depth «qual to the thickness of the tim-

ber, and the tongue, which is usually of harder timber, is dressed to a tight fit. Fig. 4 illustrates how additional strength is obtained by framing the ends with narrow fiieces, which may be dowelled on, or tongue and grooved as shown at A and B. A further method, which is not often used, consists of naiTow strips let into the under side as shown in Fig. 5. A groove is routed out to half the thickness of the timber, and the strips are usually of hard wood. Sometimes these are dovetailed and driven in from the edge, when they make an excellent job. Jumbled Birds' Names ("Sent Stuart Dunbar, 11 year?') 1. nrwe 4. iottrr.t 2. ionbr 5. eywxea 3. imgaep 6. fgnlhocdl Answers on pag-p 8.