An asphalt paving crew is used to pave a 500-foot by 300-foot parking lot. The parking lot will be paved in 12-foot-wide strips running the long (500-foot) direction. The machine paves 11 lineal feet of 12-foot-wide parking lot per minute. A single lift of asphalt will be used on the parking lot. After completing a pass, it takes the crew 10 minutes to turn the paving machine around and get ready

Question

for the next pass. The crew consists of a foreperson, six operators, and a laborer. Using a system efficiency of 50 minutes per hour, determine the number of labor hours required to place 1 lineal foot of parking lot 12 feet wide.

What will be an ideal response?

Answer 1

Determine the productivity rate as follows:



Number of passes = 300 ft / 12 ft per pass × 1 lifts = 25 passes



Quantity = 25 passes × 500 ft = 12,500 lft



There will be one less turn than passes.



Travel time = 24 turns × 10 minutes per turn = 240 minutes