Observations indicate that an excavator carries an average bucket load of 2.3 LCM per cycle. The soil's load factor is 0.80 and the cycle time averages 0.35 min. Job conditions are rated fair, and management conditions are rated as good. Estimate the hourly excavator production in bank measure to the nearest whole number (zero decimal places).

Observations indicate that an excavator carries an average bucket load of 2.3 LCM per cycle. The soil's load factor is 0.80 and the cycle time averages 0.35 min. Job conditions are rated fair, and management conditions are rated as good. Estimate the hourly excavator production in bank measure to the nearest whole number (zero decimal places).

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter10: Pricing Excavation And Backfill

Section: Chapter Questions

Problem 6RQ

See similar textbooks

Similar questions

An excavator bucket has a heaped capacity of 6.2 CY and a bucket fill factor of 0.85. What is the bucket capacity?a. 5.35 CY b. 6.1 CY c. 7.3 CY d. 5.27 CY
A limestone mine has the following equipment at its primary production face: Excavator: a 15 yd3 (11.5 m3) front-end loader with 40 sec cycle time Trucks: five 100 ton (90 tonne) trucks Material: average blasted rock with medium-hard digging conditions Working conditions: average Haulage cycle time: 20.0 min (a) What is the sustained production rate of the system in tons/hr, assuming 60 min of production per hour'? (b) Which equipment (loader or trucks) governs? (c) What improvements would you recommend to increase mine production without changing equipment?
A project to move packed earth requires you to decide whether to usea dozer/scraper operation or excavator/truck operation. Determinethe most economical operation based on the dozer/scraper operationestimated at $1.25/cy. All equipment carries a rated heaped capacity, hasa fill factor of 100%, and works 45-min hours. Excavator costs $95/hr（including operator), cycle time is 0.28 min, and bucket heaped capacityis 5.0 cy. Truck costs $150/hr.(including operator), dump time is 0.5 min（maneuver, dump, turn), heaped capacity is 31.7 cy, and 12 trucks areavailable for the project.Hauling equipment operates in one directionfrom A to B to C and finally to D. Section Load Length (ft) Speed (mph) A full 3000 9B full 2500 17C empty 3000 36D empty 3000 16
What is the approximate optimum hourly production rate for a wheeled backhoe filling hauling units? Struck capacity for the bucket is 6 loose cubic feet and the bucket fill factor is 110%,. The cycle time is 2 minutes, the soil type is moist loam with a 25% swell factor.
do not solve it wrong, uploading for the second time, need detailed solution
Calculate the total operation time for this construction activity if the volume of soil to be removed is 8 cu.m. (considered 33% for bulking of materials.) The speed of dumptruck is 30 kph and travel distance (round trip) from the source to disposal area vice-versa is 6 km. The bucket size of excavator is 0.50 cu.m at 0.50 min loading time, tipping time is 4 mins. a. 15.18 minutes b. 22.02 minutes c. 25.32 minutes d. 30.00 minutes
Design pit volume when the depth is less than or equal to 4 m. Life of pit 6 years and total users 10 persons?
Assuming that each load is a full-capacity load, howmany truckloads are required to construct the fill?
a. Assuming that each load is a full-capacity load, howmany truckloads are required to construct the fill?b. What should be the volume of the pit that remains in theborrow area after all the material required for the fill hasbeen removed?c. How many liters of water will have to be added per truckload,assuming that the moisture lost by evaporation duringexcavation, haulage, and handling is negligible?d. If the fill should become saturated at some time subsequentto the construction and does not change volumeappreciably, what will be its saturation water content?
A hydraulic excavator with a 2 cubic yard heaped capacity bucket is excavating in common earth. The depth of the excavation is 8 feet. The excavator has a maximum rated digging depth of 16 feet. The excavated material will be positioned so that the swing angle is 75 degrees. The job efficiency is 55 minutes per hour. Find the expected production per hour.
underwhat condition would you preferborrowing new materials from a borrow pit for highwayembankment
Question: a. Compute the overhaul volume. b. Compute the length of overhaul if total cost of hauling is P105,750.00 c. Compute the total cost of borrow.