Joggled And Wedged Splice. Fig. 136.

Material:

2 pieces, 6"X 1 1/2" X 7/8".

This form of scarfed joint is used to lengthen timbers with the least possible sacrifice of shearing strength, the method used in making it being similar to that described in Topic 60. Like other forms of construction of this type, it is not used as much as formerly, on account of the development of steel construction. It is, however, valuable as an exercise in accuracy.

The cut at a is made at an angle of about 60° with the edges of the pieces, and should be about 3" long. The angle of the joint should be ascertained by marking with a knife from the bottom of the cut of one edge to the face of a on the other. Transfer these lines to the other side of each piece. The key should consist of two wedges, made to fit the key way snugly; do not cut the keys to a neat, or close, length, but leave them long enough to run through, and allow for driving them to bring the joint to a perfect fit. Afterwards they may be cut off, say \" from each side of the model.

Fig. 136. - Joggled and Wedged Splice.