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HOURLY PRODUCTION <br />Hauling Capacity : <br />Scraper Payload (weight) Basis : <br />Material weight : 2,550 pounds/LCY <br />Material description <br />Earth - Dry packed <br />Rated payload : 48,000 pounds <br />Payload capacity : 18.82 LCY <br />Cycle Time : Job Condition Corrections : Site altitude (ft.) : 7,500 <br /> Scraper Push dozer Source <br />Scraper loading time 0.40 minutes Altitude adj.: 1.000 1.000 (Cat HB) <br />Maneuver and spread time : 0.60 minutes Job efficiency : 0.830 0.830 (Cat HB) <br />' load time per scraper pair on push-pull models Net correction : 0.830 0.830 <br />Travel time : <br />Road condition description : Rutted dirt, little maintenance, no water, I" tire penetration <br />Haul Route : <br />Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.r* <br />1 1,000 10.00 4.00 14.00 775 1.31 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Haul time : 1.31 <br />Return route : <br /> sheet 2 of 2 <br /> <br />Scraper Bowl (volume) Basis : <br />Struck volume : 15.70 LCY <br />Heaped volume : 21.00 LCY <br />Average volume : 18.35 LCY <br />Adjusted capacity : 18.35 LCY <br />' hourly production reflects volume per scraper pair on push-pull models <br />minutes <br />0.41 <br />2.72 <br />336.07 <br />2 <br />672.14 <br />672.14 <br />travel time for each segment is adjusted for acceleration/deceleration. Return time : <br />table velocities are max. attainable per total resistance shown, not average <br />Total scraper team cycle time (load + haul + maneuver and spread + return) <br />Unadjusted unit production/hour : 404.90 LCY/hour Adjusted for job conditions : <br />Optimal number of scrapers per push dozer : 3 Selected number of scrapers : <br />Adjusted single scraper team (unit) hourly production <br />Adjusted multiple scraper team (fleet) hourly production <br />JOB TIME AND COST <br />Fleet size <br />Unit cost <br />1 Team(s) <br />$0.930 /LCY <br />Total job time <br />Total job cost <br />RN-05 Exhibit 28-58 <br />3.73 <br />57.333 <br />minutes <br /> <br />minutes <br />LCY/hour <br />scraper(s) <br />LCY/hour <br />LCY/hour <br />Hours <br />(Revised 2/16/09)