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 1018
^^^.^,,1 J … 10 11 Fig. 10. Vault size 1 to be used on runs of 1 to 3. Ducts of conduit when not intersected. Fig. 11. Vault size 2 to be used on run.s of 1 to 3 ducts of conduit when intersected. enough to leave a space of 6 ins. around the outside of the wallof the manhole when finished. In stiff clay, the…
