9.5 A crawler hoe having a 24 -cy bucket and whose cost per hour, including the wages to an operator, is $109 will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 22 ft. Determine the cost per bank cubic yard for cach condition. (Condition 1: 315 bey/hr, S0.346/bcy; condition 2: 289 bey/hr, $0.377/bcy; condition 3: 99 bey/hr, S1.101/bey) Condition (1) (2) (3) Rock, poorly blasted Sand and Moist loam, earth Material gravel 12 10 100 Depth of excavation (ft) Angle of swing (degrees) Percent swell Efficiency factor (min per hr) 15 60 80 14 50 45 50

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Measuring site work, Excavation and Piling

Bid drawings typically include very little material about the precise requirements of site work operations, measuring site work and excavation work differs from measuring most other works on a construction project. The actual site work conditions are not provided and also the dimensions of the excavations are not known during the pre-construction phase. The precise measurement of the excavation and backfill of the earth material and topsoil is important for a contractor to decide upon the total cost required for the process. All the works should be carried out under OSHA (Occupational Safety and Health Administration) standards to ensure the safety of the workers.