Fig. 361. - A Butt Miter of a Molding Inclined in Elevation Against a Plain Surface Oblique in Plan.
Let A B in Fig. 361 be the profile of a given cornice, and let E D represent the rake or incline of the cornice as seen in elevation. Let G H represent the angle of the intersecting surface in plan. The first step in developing the pattern will be to obtain the miter line in the elevation, as shown by E F. For this purpose draw the profile A B in connection with the raking cornice, which space in the usual manner, as indicated by the small figures. Draw a duplicate of this profile, as shown by A1 B1, placing it in proper position with reference to the lines of the plan. Space the profile A1 B1 into the same number of parts as A B, and through the points thus obtained carry lines parallel to the lines of the cornice, as seen in plan, cutting the line G H, as shown, In like manner draw lines through the points in A B, carrying them parallel to the lines of the raking cornice in the direction of E F indefinitely, as shown. Place the T-square at right angles to the lines of the cornice, as shown in plan, and, bringing it against the points of intersection in the line G H, carry lines vertically, cutting corresponding lines in the inclined cornice drawn from the profile A B. Through the points of intersection thus obtained trace a line, as shown from E to F. Then E F will be the miter line in elevation, formed by an inclined cornice of the profile A B meeting a surface in the angle shown by G H in the plan.
At right angles to the raking cornice lay off a stretchout of A B upon any line, as K L, and through the points draw the usual measuring lines, all as shown. Place the T-square at right angles to the lines of the raking cornice, and, bringing it against the several points in the miter line E F, cut corresponding measuring lines drawn through the stretchout K L. A line traced through, these points of intersection, as shown from M to N, will be the pattern required.