This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
For the pattern for that part of the moulding shown by C D E Q' in plan, and H G 8' 1' in elevation, proceed as follows: At right angles to 1 H in elevation, draw the line T U, upon which place the stretchout of the profile L M, as shown by the figures 1 to 8. At right angles to T U, and through these figures, draw lines, as shown, which intersect with lines of similar numbers drawn at right angles to 1 H from intersections on the miter-line 1' 8' and from intersections against the vertical surface H G. Lines traced through points thus obtained, as shown by V W X Y, will be the pattern for that part of the gable shown in plan by C D E Q' of Fig. 307.
In Fig. 308, on the other hand, the position of the plan is changed, so as to bring the line A Q horizontal. At right angles to B C draw the vertical line C E, on which locate any point, as E. In the same manner, at right angles to C B, draw the vertical line B J indefinitely. From the point E, parallel to B C, draw the line E 8", intersecting the line J B, as shown. Now take the distance from 8" to J in elevation, Fig. 307, and set it off from 8" toward J in FIg. 308. Draw a line from J to E, which will represent the true rake for this portion of the moulding. Now take the various heights shown from 1 to 8 on the line Z Z in elevation in Fig. 307, and place them as shown by Z X in elevation, Fig 308, being careful to place the point 8 of the lineZZ on the line 8" E extended. At right angles to Z z, and from points on same, draw lines, which intersect with lines drawn at right angles to B C from intersections of similar numbers on C Q in plan. A line traced through points thus obtained, as shown by D E in elevation, will be the miter-line on C Q in plan.
From the intersections on the miter-line D E, and parallel to E J, trace lines, which intersect with lines drawn from intersections of similar numbers on A B in plan at right angles to B C. A line traced through points thus obtained, as shown by F J, will be the miter-line or line of joint againsl the pier shwn in plan by B A. Before obtaining the pattern it will be necessary to obtain a true section or profile at right angles to the moulding F D. To do so, proceed as follows; Transfer the given profile L M in elevation in Fig.
307, with the divisions and figures on same, to a position at right angles to F D of Fig. 308, as shown at L. At right angles to F D, and from the inersections in the profile L, draw lines intersecting those of similar numbers in F D E J. Trace a line through intersections thus obtained, as shown from 1 to 8, thus giving the profile M, or true sections at right angles to F D.
For the pattern, proceed as follows: At right angles to F D, draw the line H K, upon which place the stretchout of the profile M, as shown by the figures. At right angles to H K, and through the figures, draw lines, which intersect with those of similar numbers drawn at right angles to F D from points of intersection in the miter-lines D E and J F, as shown. Lines traced through points thus obtained, as shown by N O P R, will be the pattern for the raking moulding shown in plan, Fig. 307, by A B C Q'.
In Fig. 309 is shown a view of a spire, square in plan, intersecting four gables. In practice, each side A is developed separately in a manner shown in Fig. 310, in which first draw the center line through the center of the gable, as E F. Establish points B and C, from which drawlines to the apex F. At pleasure, establish A D. At right angles to F E, and from B and J, draw the lines B H and J K respectively. For the pattern, take the distances B K K A, and A F, and place them as shown by similar letters on the vertical line B F in Fig. 311. At right angles to B F, and through points B and A, draw lines as shown, making B H and B H1 on the one hand, and A N and A O on the other hand, equal respectively to B H and A N in elevation in Fig. 310. Then, in Fig. 311. draw lines from N to H to K to H1 to O, as shown, which represents the pattern for one side.
In Fig. 312 is shown a perspective view of a drop B mitering against the face of the bracket C as indicated at A The principles for developing this problem are explained in Fig. 313, and can be applied to similar work no matter what the profiles of the drop or bracket may be. Let A B C D E represent the face or front view of the bracket drop, and F H G I the side of the drop and bracket. Divide one-half of the face, as D C, into equal spaces, as shown by the figures 1 to 7 on either side, from which points draw horizontal lines crossing H G in side v iew and intersecting the face H I of the bracket at points 1' to 7'. In line with H G, draw the Line J K, upon which place the stretchout of the profile B C D, as shown by 1 to 7 to 7 to 1 on J K. At right angles to J K, draw the usual measuring lines as shown which intersect by lines drawn parallel to J K from similarly numbered intersections on HI. Trace a line through the points thus obtained. Then will J K L be the pattern for the return of the drop on the face of the bracket.
In Fig. 314, A shows a raking bracket placed in a gable moulding. When brackets are placed in a vertical position in any raking moulding, they are called "raking" brackets. B represents a raking bracket placed at the center of the gable. The patterns which will be developed for the bracket A are also used for B, the cuts being similar, the only difference being that one-half the width of the bracket in B is formed right and the other half left, the two halves being then joined at the angle as shown.