Illinois Society of Architects · Chicago · leaf 554
o 70 sq. ft. 1 pipe, 71 sq. ft. to 120 sq. ft. 114 pipe, 121 sq. ft. to 180 sq. ft. 11/2 pipe, 181 sq. ft. to 250 sq. ft. Sizes of Valves. 1/2 valve, 0 sq. ft. to 60 sq. ft. % valve, 61 sq. ft. to 90 sq. ft.1 valve, 91 sq. ft. to 130 sq. ft.114 valve, 131 sq. ft. to ISO sq. ft.lyo valve, 181 sq.… … \\\m
Architecture · Building · Architects
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