. Handbook of construction plant, its cost and efficiency. Fig. 03. Excavating Trench ,for Sewers Seventy-Eight InchesWide and Twenty Feet Deep at Des Moines, Iowa. repairs were also estimated at $, which is considered depreciation is taken at 300 days work per year for tenyears, and although it is assumed that the owner of such amachine will be able to sell it at the end of that time, no allow-ance for salvage value is made here. Assuming that the brick sewer may follow the machine at arate of 170 ft. per day, the cost per foot of trench excavationis 10 cents, or 5 cents per c
. Handbook of construction plant, its cost and efficiency. Fig. 03. Excavating Trench ,for Sewers Seventy-Eight InchesWide and Twenty Feet Deep at Des Moines, Iowa. repairs were also estimated at $, which is considered depreciation is taken at 300 days work per year for tenyears, and although it is assumed that the owner of such amachine will be able to sell it at the end of that time, no allow-ance for salvage value is made here. Assuming that the brick sewer may follow the machine at arate of 170 ft. per day, the cost per foot of trench excavationis 10 cents, or 5 cents per cu. yd. If the contractor coulddouble the rate of brick construction he could then reduce the 642 HANDBOOK OF CONSTRUCTION PLANT excavation cost by one-half, as he states that the machine isused about 50 per cent of the time. Other items enter into theincrease in speed of brick sewer construction which mightincrease the cost of that part of the work more than the reduc-. Fig. 304. Carson Trench Machine Purchased by City of Brandon, Manitoba, Canada, and in Use on First Street Sewer. Hoistp Six Tubs at a Time.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuilding, bookyear191
