Page:Cassells' Carpentry and Joinery.djvu/218

194 to receive the upper rafters as shown at A deeper piece of stuff is used for the trimmer,, against which the lower rafters butt. This trimmer is fixed to the stout rafters, and is allowed to project as shown so as to support the sill of the dormer. Fig. 691, which is a conventional view of the dormer framed together ready to be fixed in its proper position, also shows how the stout rafters are supported by ashlering studs which are fixed to them.

The preparing of a dormer of this description is the work of a joiner rather than of a carpenter. A few leading particulars of the construction will now be given. The angle posts are rebated and beaded to receive casement sashes; they are also chamfered on the outside and moulded on the inside as shown by the enlarged section, Fig. 695. These angle posts are connected to the double sunk oak sill in the way represented at Fig. 696, and to the bottom rail of the side light by a barefaced haunched tenon as shown at in the same illustration. These joints may be held together more firmly by the insertion of stout screws 5 in. long, or bed screws may be used if desired. Fig. 697 shows the connections for the post, the head, and the top rail of light, the joints being firmly held together by a bolt inserted from the outside of the top rail. This bolt is passed through into the head in which has been made a mortice to receive a nut, as indicated at, Fig. 697. The bottom and top rails of the side lights are connected by mortice and tenon joints at their upper end The top rails are made to project beyond the posts so that the lower ends of the bargeboards may be fixed to them. The ridge also projects, and is tenoned into the finial to which the upper ends of the bargeboards and moulding are butted and fixed. The top end of the top rail and end of ridge piece are connected by means of two pieces of in. boards. The ceiling joists of the dormer are notched down on the top rails of the side lights and nailed. The rafters of spars are cut to fit the ridge, and are notched on to the top rails as shown. The two pieces of board before mentioned receive the ends of the small jack rafters. The gabled part of the dormer is formed by a