Ambrug20
Project Engineer
Problem #11.6
My questions is: Where is 16.3 come from and units lcy –what is this
A test strip shows that a steel-wheeler roller, operating at 3mph, can compact a 0.5 ft. layer of material to a proper density in four passes. The width of the drum is 8.0 ft. The roller operates 50 min per hour. The number of rollers requires to keep us with a material delivery rate of 540 bank cubic yds/hr in (1 bank cubic yard = 0.83 ccy):
a. 1
b. 2
c. 3
4. 4
Solution: first calculate the roller production:
Ccy/hr = (16.3 x 8ft x 3mph x 6 inch x 50min/60min)/4 passes = 489 ccy/hr
489 ccy/hy / 0.89 = 589.2 bcy/hr
Thus, 540 / 589.2 = 0.92 < 1
Therefore, only one roller is required to keep up with delivery of material.
Production = (2.5 icy/cycle x 45 min/hr) / 0.85 min/cycle = 132 lcy/hr
My questions is: Where is 16.3 come from and units lcy –what is this
My questions is: Where is 16.3 come from and units lcy –what is this
A test strip shows that a steel-wheeler roller, operating at 3mph, can compact a 0.5 ft. layer of material to a proper density in four passes. The width of the drum is 8.0 ft. The roller operates 50 min per hour. The number of rollers requires to keep us with a material delivery rate of 540 bank cubic yds/hr in (1 bank cubic yard = 0.83 ccy):
a. 1
b. 2
c. 3
4. 4
Solution: first calculate the roller production:
Ccy/hr = (16.3 x 8ft x 3mph x 6 inch x 50min/60min)/4 passes = 489 ccy/hr
489 ccy/hy / 0.89 = 589.2 bcy/hr
Thus, 540 / 589.2 = 0.92 < 1
Therefore, only one roller is required to keep up with delivery of material.
Production = (2.5 icy/cycle x 45 min/hr) / 0.85 min/cycle = 132 lcy/hr
My questions is: Where is 16.3 come from and units lcy –what is this