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EARTHWORK ESTIMATING - RIPPING wORr <br />TASK DESCRIPTION: • I~ / <br />p, ~ <br />A <br />`.r,~~ <br />iOURLY EQUIPMENT COST: <br />Machine make and model Q -7(r attachments: 3 S/ior,~ <br /> adjusted Operator Cost Per Hour <br /> <br />shift <br />no. hours <br />per <br />da days <br />per <br />week base <br />rental <br />rate/hr. <br />operating <br />cost/hr base <br />wage <br />rate/hr <br />overtime <br />ad'ustment s ift <br />premium <br />adj. total <br />equip. <br />cost/hr <br />1 ~ S 37.r "37,_Y y U,u~ N/A C <br /> , <br />3 „ „ <br />LOLaI = j <br />$ Q Y,0007 /hr. divided by I shifts/day = $ 9 Y.(e:J average equipment cost/h r. <br />MATERIAL QUANTITIES: <br />Volume Method (bank material or rock): BCY (total to be ripped) <br />type of material seizmic ve ocity = fps <br />Area method (compacted fills, pavement) = sq. ft. (total area) <br />ripping depth required to alleviate compaction = inches <br />Verification method(s) used <br />- HOURLY PRODUCTIDN: <br />C Volume method (for DAL, D9L, and D10 dozers w/single shank rippers only): <br />BCY/hr from production graphs in Sec. VII x job efficiency (avg. for <br />a71 sus x altitude adj. = BCY/hr~a justed production <br />Area method (for dozers, track loaders or graders w/multi-shank rippers) <br />,Qµ ;.~`E~/hr (from production tables in Section VII) x o "5~' job <br />e iciency avg. for all shifts) x altitude adj. _ /,~ ~ sg,--ft./hr <br />'S- <br />JOB TIME: :-.~..-!. <br />Volume method: BCY divided by BCY/hr = hrs <br />ot. mat. volume apJ. pro tot. Joo time <br />C. <br />Area method: 3h, (e f{ ~~. divided by ~~V~ ` °}/hr = ~Zr/~ hrs <br />totTea a3j. proms tot. ,7o time <br />JOB COST: <br />31,q hrs x ; gYriQ(j /hr = $ Sd53 Total Job Cost <br />tot. job time avg. equip. cost <br />unit cost = $ divided by = $ <br />total job cost total vol. or area BCY or sq. ft. <br /> <br />