| Fig. 339. | Fig. 340. |
Method of Building up Semicircular Head of Door Frame.
[Fig. 336] shows a circular rim, or curb, made of segments which are halved together. This method is suitable for heavy work, where the timbers are of considerable size. The halvings are cut on the ends of the segments to any convenient shape or bevel, each one being marked so as to fit its fellow.
Fig. 341.—Part of Laminated Table Frame.
Fig. 342.—Half of Laminated Core Box.
When extra length is required, semicircular or circular work is built up out of four or five thicknesses of wood, and the method is called laminating. The method of building up the semicircular head of a door frame by this method is shown at [Figs. 339 and 340].