Handbook of mechanical and electrical cost data, giving shipping weights, capacities, outputs, and net prices of machines and apparatus, and detailed costs of installation, maintenance, depreciation and operation, together with many principles and data relating to engineering economics (1918)
Gillette, Halbert Powers, 1869-, Dana, Richard Turner, 1876-1928, joint author · New York, McGraw-Hill · leaf 988
Fig.Fig. 1. McRoy tile, 4-duct conduit, class 2. McRoy tile, 4-duct conduit, class A construction. B construction. The proportions of materials to be used in mixing, concrete forconduit construction shall be as follows: If crushed stone con-crete is used. 1 part of American Portland cement, 4 parts…
