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 156
ortion. 212. Fire Escapes for Schools, Factories, etc.—shouldhave the balcony extend across several windows; the stairsconstructed of cast-iron treads and wrought-iron strings, andarranged outside of balconies. 213. Vault Cover and Frame.—This is principally usedfor openings into coal vault under… … thick with f of an inch rebate for the cover. The cover has a roughened surface to prevent pedestrians from slipping. It iscast \ inch thick in centre to f of an inch at rebate, and madefrom 16 to 24 inches in diameter. Almost any size can be made 138 ARCHITECTURAL IRON AND STEEL. for special…
Building, Iron and steel
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