Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 645
MACHINES 641 but the averag-e 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: Eng-ineer $5.00 Fireman 2.5 ) Coal 4.00 Oil and waste 50 Repairs 1.00… … Fig. 303. Excavating Trench for Sewers Seventy-Eight InchesWide and Twenty Feet Deep at Des IVIoines, 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 sucli amachine…
Contractors' operations · Building
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