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A small hydraulic excavator will be used to dig a trench in hard clay (bucket fill factor = 0.80). The minimum trench size is 26 in. (0.66 m) wide by 5 ft (1.53 m) deep. The excavator bucket available is 30 in. (0.76 m) wide and has a heaped capacity of % cu yd (OS7 m3), The maximum digging depth of the excavator is 16 ft (4.9 m). The average swing angle is expected to be 85°. Estimate the hourly trench production in linear feet (meters) if job efficiency is 70%. 8. A hydraulic excavator-backhoe is excavating the basement for a building. Heaped bucket capacity is 1.5 cu yd (1.15 m3), The material is common earth with a bucket fill factor of 0.90. Job efficiency is estimated to be 50 minlh. The machine's maximum depth of cut is 24 ft (7.3 m) and the average digging depth is 13 ft (4.0 m). Average swing angle is 90°. Estimate the hourly production in bank measure.
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