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
s. To this must be added$15.10 for cover and casting-. Vault or Manhole Construction. Telephone Construction, by G.Mayer, has the following: The location of a vault shall be barri-caded and excavation then made to such a depth as to bring thebottom of the concrete top 17.5 ins. below street grade.… … ^^^.^,,1 J