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• Hine Area Yoast <br />Project Facilities - Grading <br />Task Rio Facilities Area <br />40RKSHEET N0. RIPFAC-1 <br />PRODUCTIVITY FOR DOZER USE - RIPPING <br />Ripping Activity: Ripping facilites prior to grading <br />Dozer/Ripper Used: D•11N, 3 shank ripper <br />Description of Ripping: <br />rip depth = 3' Volume = 3' deep x 20.4 ac, = 99704 <br />cut spacing = 6.15' per pass <br />cut Length = 300' <br />Productivity Calculations: <br />Cycle time = ( 300 ) ft / 88 fom) + 0.25 = 3.66 min/pass <br />cut length speed turn time <br />• Passes/hour = 45 min/hr / 3.66 min/pass = 72.3 passes/hr <br />pork hr. factor cycle time <br />Volume cut = ( 3 ft x 6.75 ft x 300 ft) / 27cf/cy = 205 bcy/pass <br />tool cut cut <br />penetration spacing length <br />Ripping Production = 205 bcy/pass x 72.3 passes/hr 2.522 bcy/hr <br />Hours Required = ( 99704 bcy / .2522 bch/hr) x - 40 hrs <br />volume hourly <br />to be ripped production <br />Cost = 5254.98 <br />Total Cost = 40 hrs. x 5254.98 cost/hr = 510.200 <br />References: <br />Table 25-2-5 <br />• Attachment 25-2 <br />x n to <br />