2009-08-31_REVISION - C1981041 (4)

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HOURLY PRODUCTION Hauling Capacity : Scraper Payload (weight) Basis : sheet 2 of 2 Scraper Bowl (volume) Basis : Material weight : 2,900 pounds/LCY Material description : Decomposed rock - 50% Rock, 50% Earth Rated payload : 55,000 pounds Payload capacity: 18.97 LCY Struck volume : 18.00 LCY Heaped volume : 23.00 LCY Average volume : 20.50 LCY Adjusted capacity : 18.97 LCY *** ' hourly production reflects volume per scraper pair on push-pull models Cycle Time : Job Condition Corrections : Site altitude (ft.) : 4,850 Scraper Push dozer Source Scraper loading time 0.90 minutes Altitude adj.: 1.000 NA (Cat HB) Maneuver and spread time : 0.70 minutes Job efficiency : 0.830 NA (Cat HB) * load time per scraper pair on push-pull models Net correction : 0.830 NA Travel time : Road condition description :Rutted dirt, little maintenance, no water, 2" tire penetration Haul Route : Seg. # Haul distance (feet) Grade (%) Roll. res. (%) Total res. (%) Velocity (fpm) Travel time (min.)** 1 600 0.00 5.00 5.00 1292 0.56 Haul time : 0.56 minutes Return route : " travel time for each segment is adjusted for acceleration/deceleration. Return time : 0.48 minutes table velocities are max. attainable per total resistance shown, not average Total scraper team cycle time (load + haul + maneuver and spread + return) : 2.65 minutes Unadjusted unit production/hour : 430.08 LCY/hour *** Adjusted for job conditions : 356.96 LCY/hour Optimal number of scrapers per push dozer : NA Selected number of scrapers : 1 scraper(s) Adjusted single scraper team (unit) hourly production : 356.96 LCY/hour Adjusted multiple scraper team (fleet) hourly production : 1,427.85 LCY/hour JOB TIME AND COST Fleet size : 4 Team(s) Total job time : 0.25 Hours Unit cost : $0.482 /LCY Total job cost : $171