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EARTHWORK ESTIMATING -SCRAPER WORK <br />TASK DESCRIPTION: ~~D.ry . ( ~~ S1 ~ .da ~,Pl'` III III'IIIIIIIII III <br />HOURLY EQUIPMENT COST: <br />Machine make and model C.Rf la37-11 N-I'o-I~ attachments <br />.a _. <br />' ad-jested Operator Cost Per Hour <br /> hours days -bases base shift total <br />shift per per rtrtts•1 operating wage overtime premium equip. <br />no. day week rate/hr. cost/hr rate/hr adjustment adj. cost/hr <br /> f.2 6 <br /> <br />2 ~ s <br />3 ~ 5 <br />iotai = d in r. <br />S /hr, divided by shifts/day = b 0, average total equip. cost/hr, <br />MATERIAL QUANTITIES: <br />BCY x swell factor ,~~ ';~ ._~' ~` LCY <br />Veri ication method s) used <br />HOURLY PRODUCTION: <br />Haul distance = /-SQO ft., return distance %~~'~ " ft., altitude = ft. <br />Total resistance hau _~_% rolling res. plus _ .fin grade res. +or- _~% <br />Total resistance {return): ''+ X rolling res. plus ~(~__% grade res. (+or-)= _ 3 % <br />Note: for grade resistance, (+) = unfavorable, ~-T = favorable (downhill) <br />Cycle time: Load (6276 = 0.8 min., 631D = 0.9 min., 657E = 1,0 min) _ .~i min. <br />Haul - see distance vs. time tables in Section VII = J.y~min. <br />Maneuver and sore ad (same for all models) _ •6 min. <br />Return -see distance vs. time tables in Section VII = •5 min. <br />total cycle time = 3,ymin./cycle <br />bO min./hr divided by ~~1- minutes/cycle = ~ ~~ cycles/h r. <br />~/ LCY rated bowl capacity (heaped x -~. ~ cycles/hr, _ ~~ LCY/h r. (unadj.) <br />.5 Y ~0 LCY/hr. x .i.5 job efficiency* altitude adj. _ ~ LCY/t1r (adj.) <br />*average efficiency for all shifts utilized , <br />Fleet production = ~ no. scraper used x ~ LCY/hr/scraper = ob `r'SLCY/hr/f'aet <br />JOB COST: <br />a~~,(o7S LCY divided by ~o`1`S LCY/hr. ld9 total job hours <br />total material vol. fleet prod. <br />5 lYd.+~~ /hr. avg. scraper cost x ~ scrapers used = y 7~,-CS fleet cost/hr <br />`d 9 hrs x ~ ?v °. SS /hr. = b ~p Total Job Cost <br />tota ~o timetime our y eet cost <br />unit cost/LCY = ; ~c~, ~fvG divided by »-? i 5 = b . ~ /LCY <br />total job cost tota material vo . <br />_, , <br />S ~ n. _. -. <br /> <br />