1
Q
OPTIMUM HOURLY PRODUCTION RATE
A
CYCLES PER HOUR X VOLUME PER CYCLE
2
Q
BANK CUBIC YARDS (B. CY)
A
SOIL RESTING IN ITS NATURAL, UNDISTURBED STATE
3
Q
LOOSE CUBIC YARD (L. CY)
A
WHEN SOIL IS EXCAVATED OR DISTURBED FROM NAT. STATE, IT SWELLS, INCREASING ITS VOLUME.
4
Q
COMPACTED CUBIC YARD (C. CY)
A
WHEN SOIL IS COMPACTED IT SHRINKS, DECREASING IN VOLUME.
5
Q
LOAD FACTOR
A
BANK VOLUME / BANK VOLUME + SWELL %
6
Q
HUMAN EFFICIENCY FACTOR
A
50 MINUTES OF PRODUCTIVE WORK PER HOUR
7
Q
EFFICIENCY FACTOR
A
MINUTES WORKED PER HOUR / 60 MINUTES=50/60=.83%
PIPE AND EXCAVATION CONTRACTING
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