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 1396
ice is only legitimatewhen the plant is in active operation, at least 60% of the work-ing hours of the year—i. e., from 4 to 5 hrs. each working day. CONVEYORS, HOISTS, CRANES, ELEVATORS 1373 In installations in which the conveyor is not used more than about1,500 hrs. per year the depreciation… … Fig. 39. Average depreciation of standard bucket conveyorshandling fine coal in pivoted buckets, spaced 30 inches. LENGTH OF CONVEYOR-SUM OF VERTICAL AND HORIZONTAL TRAVEL(H* DTNONE DIRECTIOIi INFEET50 100 150 200 250 300 350 400 450 500 550 60q,.„» ,
