Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 145
nbe done the same as if regular i^ieced elbows were being developed.As the elbow is to consist of four pieces in 90°, follow the rule given in connection with elbow drafting. The top and bottom 90piece equal 2; the two middle pieces equal 4; total 6. -^ = 11 Lay off A B C D according to the…
Architecture · Building · Carpentry
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