Aladdin Manual of construction : containing practical methods covering every step necessary in the erection of Aladdin houses, barns, garages, etc. / prepared and illustrated by David S. Betcone (1918)
Betcone, David S, Aladdin Company · Bay City, Mich. : Aladdin Co. · leaf 152
it is better to grade l/2 inch per foot, or use a size larger pipe than with but never use a main header less than 3 inches in diameter, or a house sewer or drain less than 4 inches in diameter. A safe rule to follow for size of header, is to allow 1 sq. inch of pipe area for each 250 sq. ft. of… … the inch srade,
Building
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