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u <br />EARTHWORK ESTIMATING -RIPPING WORK (SINGLE SHIFT) <br />AREA METHOD <br />TASK DESCRIPTION - Rip backfilled; rough graded areas <br />HOURLY EQUIPMENT COST <br />Task 5 <br />MACHINE MAKE AND MODEL - Cat D-8N w/ S Blade <br />ATTACHMENTS 3-shank ripper <br />OWNERSHIP COST/hr 46.40 <br />OPERATING COST/hr 51.67 <br />ADJUSTMENTS RIPPER 6.68 <br />OPERATOR COST/hr 22.95 <br />MACHINE COST $127.70 <br />ADJUSTMENTS from CCA Schedule + fringes and payroll taxes <br />MATERIAL QUANTITIES <br />AREA METHOD (COMPACTED FILLS, PAVEMENT) <br />AREA TO BE RIPPED <br />JOB TIME <br />6.7 acres <br />L~ <br /> <br />VERIFICATION METHOD <br />HOURLY RIPPING PRODUCTION <br />RIPPING WIDTH <br />RIPPING DEPTH <br />PASS LENGTH <br />MACHINE VELOCITY <br />MANUVER TIME <br />CYCLE TIME _ <br />AREA/CYCLE _ <br />HOURLY PRODUCTION <br />(@ 50 min / hr) <br />291,852 sgft <br />(5.2ac + 1.5ac) X 43,560 sgft/ac = <br />291,852 sgft <br />7.08 FEET <br />2 FEET <br />100 FEET <br />88 FT/MIN <br />0.25 MIN <br />1.39 MIN <br />708.00 SOFT <br />25,534.43 SOFT/HR <br />AREA TO BE RIPPED 291,852 sgft <br />NUMBER OF DOZERS 1 <br />ADJUSTED RIPPING RATE 25,534 sgft/fv <br />TOTAL JOB TIME = 11.43 hours <br />JOB COST <br />TOTAL JOB TIME <br />TOTAL MACHINE COST <br />COST PER UNIT AREA <br />11.43 HOURS <br />$127.70 $/HR <br />TOTAL JOB COST <br />$217.848 PER ACRE <br />51,459.58 <br />Mc VOL 1 - Tbl 3.7-1 Task 5 11-19 - 98 <br />