A 5.25-cubic-yard (rated heaped capacity) articulated wheeled loader is loading mixed moist aggregate into dump trucks...
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A 5.25-cubic-yard (rated heaped capacity) articulated wheeled loader is loading mixed moist aggregate into dump trucks from a stockpile. Assume the loader has an average haul distance of 20 feet (one way), operates at an average speed of 2.8 miles per hour, and works 50 minutes per hour. The static tipping load for the loader is 33,700 pounds. The aggregate weighs 3,000 pounds per loose cubic yard. If the average hourly ownership and operating cost is $118 per hour and the operator earns $61 per hour, what is the estimated cost per loose cubic yard to load the trucks? Assume that the loader does not wait for trucks to arrive at the loading site or to be spotted for loading. Note: The fixed time should be estimated: • between 0.25 and 0.35 minutes for a tracked loader between 0.45 and 0.55 minutes for an articulated wheel loader between 0.55 and 0.75 minutes for a straight-frame wheel loader Material Loose Material Mixed moist aggregates Uniform aggregates up to 1/8 inch dia Uniform aggregates 1/8 to 3/8 inch dia Uniform aggregates over 3/8 inch dia Blasted Rock Well-blasted rock Average-blasted rock Poorly-blasted rock Other Rock dirt mixtures Moist loam Soil, boulders, roots Cemented materials Fill Factor 0.95-1.00 0.95-1.00 0.90-0.95 0.85-0.90 0.80-0.95 0.75-0.90 0.60-0.75 1.00-1.20 1.00-1.10 0.80-1.00 0.85-0.95 A 5.25-cubic-yard (rated heaped capacity) articulated wheeled loader is loading mixed moist aggregate into dump trucks from a stockpile. Assume the loader has an average haul distance of 20 feet (one way), operates at an average speed of 2.8 miles per hour, and works 50 minutes per hour. The static tipping load for the loader is 33,700 pounds. The aggregate weighs 3,000 pounds per loose cubic yard. If the average hourly ownership and operating cost is $118 per hour and the operator earns $61 per hour, what is the estimated cost per loose cubic yard to load the trucks? Assume that the loader does not wait for trucks to arrive at the loading site or to be spotted for loading. Note: The fixed time should be estimated: • between 0.25 and 0.35 minutes for a tracked loader between 0.45 and 0.55 minutes for an articulated wheel loader between 0.55 and 0.75 minutes for a straight-frame wheel loader Material Loose Material Mixed moist aggregates Uniform aggregates up to 1/8 inch dia Uniform aggregates 1/8 to 3/8 inch dia Uniform aggregates over 3/8 inch dia Blasted Rock Well-blasted rock Average-blasted rock Poorly-blasted rock Other Rock dirt mixtures Moist loam Soil, boulders, roots Cemented materials Fill Factor 0.95-1.00 0.95-1.00 0.90-0.95 0.85-0.90 0.80-0.95 0.75-0.90 0.60-0.75 1.00-1.20 1.00-1.10 0.80-1.00 0.85-0.95
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Loose Volume of soil to be moved Given Data Size of excavation 1... View the full answer
Related Book For
Fundamentals Of Hydraulic Engineering Systems
ISBN: 978-0136016380
4th Edition
Authors: Robert J. Houghtalen, A. Osman H. Akan, Ned H. C. Hwang
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