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 36
times thedepth of beam apart, and holes are usually punched in thecentre of web ; but they should be placed as low as possible,so as not to be seen, and not injure under side of arch. Fig. 4at B shows a smaller framed into a larger beam, and flush onbottom, with the angle-iron knees on the web… … ;wW;W/fr/^W^ Fi
Building, Iron and steel
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