A project consists of replacing the track on an existing railroad line, involving 3,000 feet oftrack. The old track can be removed at a rate of 70 feet per hour. The old railroad ties can beremoved at a rate of 200 feet (measured along the track) per hour. The new ties can be installedat a rate of 25 feet per hour and the replacement track can be installed at a rate of 40 feet perhour. Show this operation on a linear schedule. Assume that the minimum float for an activity atany location is one day

A project consists of replacing the track on an existing railroad line, involving 3,000 feet oftrack. The old track can be removed at a rate of 70 feet per hour. The old railroad ties can beremoved at a rate of 200 feet (measured along the track) per hour. The new ties can be installedat a rate of 25 feet per hour and the replacement track can be installed at a rate of 40 feet perhour. Show this operation on a linear schedule. Assume that the minimum float for an activity atany location is one day

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 7RQ

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A project consists of replacing the track on an existing railroad line, involving 3,000 feet of track. The old track can be removed at a rate of 70 feet per hour. The old rail- road ties can be removed at a rate of 200 feet (measured along the track) per hour. The new ties can be installed at a rate of 25 feet per hour, and the replacement track can be installed at a rate of 40 feet per hour. Show this oper- ation on a linear schedule. Assume that the minimum float for an activity at any location is 1 day.
A belt conveyor is required to deliver crushed limestone having a bulk density of 75 lb/cu ft at the rate of 200 tons/hr. The conveyor is to be 200 ft between center of pulleys with a rise of 25 ft. The largest lumps are 4 in. and constitute 15% of the total. The conveyor will discharge over the end. For a belt speed of 200 fpm, what is the minimum width of belt that can be used? Calculate the horsepower for the drive motor.
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Discuss the importance of load balancing as it may relate to safety in agricultural facilities.
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