A New Method of Calculating the Cubic Contents of Excavations and Embankments, by the Aid of Diagrams: Together with Direction for Estimating the Cost of Earthwork

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W. Hamilton, 1869 - Broj stranica: 60
 

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Stranica 1 - Method of Calculating the Cubic Contents of Excavations and Embankments by the Aid of Diagrams 8vo, 2 00 Webb's Economics of Railroad Construction Large 12mo, 2 50 Railroad Construction 16mo, mor.
Stranica 19 - ... divided by 27, the number of cubic feet in a cubic yard, or 18.632-^ cubic yards. If this canal be required to be enlarged to the dimensions recommended for the Chesapeake and Ohio canal by the United States...
Stranica 50 - ... miles per hour, or 200 feet per minute, which is equal to 100 feet of trip each way, or to 100 feet of lead, as the distance to which the earth is hauled is technically called. Besides this, there is a loss of four minutes in every trip, whether long or short, in waiting to load, dumping, turning, etc. Hence every trip will occupy as many minutes as there are lengths of 100 feet each in the lead, and four minutes besides ; therefore, to find the number of trips per day over any average lead,...
Stranica 58 - GO cts., depending on the position of the strata, hardness, toughness, water, and other considerations. Soft shales and other allied rocks may frequently be loosened by pick and plough as low as 15 to 20 cts., while on the other hand shallow cuttings of very tough rock with an unfavorable position...

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