Architectural iron and steel, and its application in the construction of buildings ... specifications of ironwork ... tables selected expressly for this work ... by Wm. H. Birkmire (1905)
Birkmire, Wm. H. (William Harvey), 1860-1924 · New York, J. Wiley · leaf 159
Tloq-r Line. ^^^^^^ … Section C is a double bridle for carrying opposite headerson one trimmer. Section B is the twist in opposite directionto that shown at A, The iron used for bridles is a mediumgrade cut to proper lengths; these are heated in a large fur-nace, bent and twisted in a machine, and completed in…
Building, Iron and steel
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