Home instruction for sheet metal workers . the center mullion L, Fig. 471A, is a reproductionof two profiles, like A, Fig. 471B, joined at an octagonal angle atthe corner 1 in L, Fig. 471A. The section of the end mullion Avhas one profile like A in Fig. 471B joined at the corner 1 in Avin Fig. 471A with a flat portion 3 in. deep at an octagonal angle,and an angle or lap bent toward the inside at X to nail against thewall through Y. To obtain the face miter between the mullion and head at 1,Fig. 467, and the butt miter between the mullion and sill at 2,proceed by the short rule given in Fig. 47
Home instruction for sheet metal workers . the center mullion L, Fig. 471A, is a reproductionof two profiles, like A, Fig. 471B, joined at an octagonal angle atthe corner 1 in L, Fig. 471A. The section of the end mullion Avhas one profile like A in Fig. 471B joined at the corner 1 in Avin Fig. 471A with a flat portion 3 in. deep at an octagonal angle,and an angle or lap bent toward the inside at X to nail against thewall through Y. To obtain the face miter between the mullion and head at 1,Fig. 467, and the butt miter between the mullion and sill at 2,proceed by the short rule given in Fig. 471B, as follows: Divide the profile A, Fig. 471B, into equal spaces shown by thesmall figures 1 to 9. Through these points drop vertical linesuntil they intersect the sill line B C by similar numbers. At rightangles to O C as shown draw any line as E D, upon which place 336 Home Instruction for Sheet Metal Workers Wall Line M///A y//////////////////////^///////yy///// //////////////////////////////. V. Section ofEnd MullionAvin the girth of double the section A from 9 to 1 to 9. Through thesepoints at right angles to E D draw lines, intersected by linesparallel to E D from similar numbered intersections in profileA and on wash B C. A line traced through points F to G to Hat the top, will be the square face miter; while a line traced atthe bottom I to J to K will be the butting miter against the G H I J K represents the miter cuts for the center mullionL in Fig. 471 A, also X X in Fig. 465, the length of which from a to b should measure 2 ft. 9 when laying out the fullsize cut from sheet metal, a dupli-cate of F G H I J K, Fig. 471B,is used to scribe the miter cuts forthe full size pieces, making the dis-tance from G to J, 2 ft. 9 in. andallow laps along the top from F toG to H and along the bottom fromI to J to K; two of these mullionswill be cut. As the end mullion Av, A, has a return of 3 in. addedincluding the lap X, simply add tothe mull
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
