Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 228
184 SHEET METAL WOEK 113 in pieces, the coppersmiths work must form a curve as shown inFig, 120 which represents a curved elbow of 45, In Fig. 121 is shown how an elbow is laid out having 90,similar principles being required for any degree of elbow. Firstdraw the side elevation of the elbow as… … Fiff. 121. Fig. 120. ing the radius E B equal to 4i inches and the diameter B C 2inches. Bisect C B at K. Then with E as center and E K asradius draw the arc K J representing the seam at the sides. Drawthe front view in its proper position as F G H, through whichdraw the center line F I…
Architecture · Building · Carpentry
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