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It <br />Ripping Activity <br />Dozer/Ripper Used <br />Description of Rippinq <br />Productivity Calculations: <br />Cyle time = <br />Passes/hr = <br />Area HG Loadout <br />project Facilities - Roads <br />Task Rip Subgrade <br />WORKSHEET NO. ROADS - 1 <br />PRODUCTIVITY FOR D02ER USE <br />After surface material is pushed off, rip to a depth of three <br />feet to aid in plant growth <br />D8N, 3 shank ripper, V blade <br />Rip Depth = 3' Volume = 3' x 50' x 4,400' = 24,400 <br />Cut Spacings = B.5' per pass <br />Cui Length = 300' <br />[ 300 ft / 88 fpm] + 0.25 = 3_66 min/pas <br />cut length speed turn time <br />45 min/hr / 3`66 min/pass 12.3 passea/hr <br />work hr. factor cyle time <br /> Vol. cut per pass = [ 3 ft x 8_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 = 24,400 bcy / 3480 bcy/hr = 7 hrs. <br /> Vol. to be ripped hrly production <br /> Cost Per Hour = $128.24 - <br /> <br /> Total Cost = 7 hrs x 5128.24 cost/h r = 5898 <br /> 23-3-15 Revised 01/30/96 <br />