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Area HG Loadout <br />Project Facilities Grading <br />Task Rlp Facllitlea Area <br />WORKSHEET NO. RIPFAC-1 <br />PRODUCTIVITY FOR D02ER USE - RIPPING <br />Ripping Activity Rip facilities prior to grading <br />Dozer/Ripper Used DBN, 3 shank ripper, V blade <br />Description of Ripping <br />Rip Depth = 3' Volume = 3'deep x 10 ac. = 98,000 cy <br />Cut Spacings = 8.5' per pass <br />Cut Length 300' <br />Productivity Calculations: <br />Cyle time = [ 300 ft / 88 fpm] + 0.25 = 3.66 min/pas <br />cut length speed turn time <br />Passes/hr 45 min/hr / 3_66 min/pass 12.3 passes/hr <br />work hr. factor cyle time <br />Vol. cut per pass = [ 3 ft x e_5 ft x 300 ft] 27cf/cy - 283 <br />bcy/pass <br />tool penetration cut spacing cut length <br />Ripping Production = ~ 283 bcy/pass x 12.3 passes/hr 3480 bcy/hr <br />Hours Required = 48000 bcy / 3480 bcy/hr 19 hrs. <br />Vol. to be ripped hrly production <br />Cost Per Hour = $128.24 <br />Total Cost = 14 hrs x 5128.24 cost/hr = 51,795 <br />23-3-14 Revised 01/30/96 <br />`. <br />1r <br />u <br />• <br />