. Cyclopedia of architecture, carpentry, and building : a general reference work .... ining the patterns, the rulewill be given for obtaining the rise of the miter line for any size 104 SHEET-METAL WORK 45 or number of pieces. No matter how many pieces an elbow has,they join together and form an angle of 90°. Thus when we speakoi a two-i)ieced, three-pieced, four, five or six-pieced elbow, wc;understand that the right-angled elbow is made up of that numberof pieces. Thus in Fig. 41 is shown a two-pieced elbow placed inthe quadrant C B, which equals 90° and makes 0 A B a rightangle. From A draw
. Cyclopedia of architecture, carpentry, and building : a general reference work .... ining the patterns, the rulewill be given for obtaining the rise of the miter line for any size 104 SHEET-METAL WORK 45 or number of pieces. No matter how many pieces an elbow has,they join together and form an angle of 90°. Thus when we speakoi a two-i)ieced, three-pieced, four, five or six-pieced elbow, wc;understand that the right-angled elbow is made up of that numberof pieces. Thus in Fig. 41 is shown a two-pieced elbow placed inthe quadrant C B, which equals 90° and makes 0 A B a rightangle. From A draw the miter line A « at an angle of 45 to thebase line A B. Then i^arallel to A B and A C and tangent to thequadrant at C and B draw lines to intersect the miter line, asshown. Knowing the diameter of the j)ipe as C D or E B drawlines parallel to the arms of the pipe, as shown. Then C B E Dwill be a two-pieced elbow, whose miter line is an angle of 45°. In a similar manner draw the quadrant B C, Fig. 42, in whichit is desired to draw a three-pieced elbow. Now follow this simple.
Size: 1487px × 1681px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksub, booksubjectarchitecture
