Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 646
NG MACHINES 641 but the average advance has been much less. The contractorstated that the machine had not worked over half the time. An estimate of the cost of operating the excavator based partlyon assumed progress, is as follows: Engineer $5.00 Fireman , 2.50 Coal 4.00 Oil and waste 50 Repairs… … Fig. 03. Excavating Trench ,for Sewers Seventy-Eight InchesWide and Twenty Feet Deep at Des Moines, Iowa. repairs were also estimated at $1.00, which is considered liberal.The depreciation is taken at 300 days work per year for tenyears, and although it is assumed that the owner of such amachine…
Contractors' operations · Building
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