In Fig. 277, let A B be the profile of any cornice and D K H C be the elevation of the same showing the curved surface C D, against which it is required to miter. The principle herein involved is exactly the same as that in Problem 1. Space the profile in the usual manner, and through the points draw lines cutting C D. At right angles to the line of cornice lay off the stretchout L M, as shown, through the points in which draw measuring lines in the usual manner. Place the T-square parallel to the stretchout line, or, what is the same, at right angles to the lines of the cornice, and, bringing it against the several points in C D, cut the corresponding measuring lines, as shown. In the event of a wide space, as shown by a' b' in the elevation, the curve between these points may be transferred to the pattern by means of a piece of tracing paper, or, if it is a regular curve, its radius may be used as shown by G and G'and the arrow points. A line traced through the several points of intersection, as shown by E F, will be the shape of the required pattern.
Fig. 277. - A Butt Miter against a Regular Curved Surfacs.
Fig. 278. - The Patterns for a Hip Finish in a Curved Mansard Roof, the Angle of the Hip being a Right Angle.