Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 229
resenting the seam at back and front,thus making the elbow in four pieces. Directly below C B draw 185 114 SHEET METAL WORK the section of the elbow as shown hy a h c d struck from M ascenter. Tliroutrb M draw the diameters h d and a c. The innercurve of the elbow a d c m plan will be stretched,… … line A E extended at O. On either side of/place the stretchoutof G a and G <^ as shown hjfa 2a\df d. Then with radii equalto O d and O a and with O on the line A B, Fig. 122, as centerdescribe the arcs d d and a a. Make the length of d d equal tothe inner curve D C in Fig. 121. From a and d in…
Architecture · Building · Carpentry
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