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EARTHWORK ESTIMATING -RIPPING WORK (SINGLE SHIFT) Task 6 <br />AREA METHOD <br />• TASK DESCRIPTION -Rip McClave to Munger road <br />HOURLY EQUIPMENT COST <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 />20,909 sgft <br />0.48 acres <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 />7.08 FEET <br />2 FEET <br />500 FEET <br />88 FT/MIN <br />0.25 MIN <br />JOB TIME <br />AREA TO BE RIPPED 20,909 sgft <br />NUMBER OF DOZERS 1 <br />ADJUSTED RIPPING RATE 29,839 sgft/hr <br />TOTAL JOB TIME _ <br />JOB COST <br />TOTAL JOB TIME <br />TOTAL MACHINE COST <br />. COST PER UNIT AREA <br />5.93 MIN <br />3,540.00 SQFT <br />29,839.08 SQFT/HR <br />0.70 hours <br />0.70 HOURS <br />$127.70 $/HR <br />TOTAL JOB COST $89.48 <br />$13.355 PER ACRE <br />Mc VOL 1 - Tbl 3.7-1 Task 6 11- 19 - 98 <br />