Two methods are available. In the simpler the ribs are merely butted together between the framing rebates, and the joints strengthened with glued canvas in the same manner as the strengthening of a crossover (232). The better method is to joint the ribs as already described, and stub tenon them about 1/8 in (3 mm) deep into the framing (231:1, 2). Curved ribs can be simply formed by pressing three or more thick veneers between sawn formers or forms (231:3), and the face mouldings worked on a wide board (231:4). The mitre cuts can be made with the help of a wooden template (231:5), with a waste piece inserted into the groove as a
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