OnGrade Manual - Ditch Witch

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OnGrade Operator’s Manual Grade Boring Concepts - 37Chapter ContentsGrade Boring ConceptsTheory of Operation . . . . . . . . . . . . . . . . . . . . . . . . 38• Job Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38• Laser Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38• Depth Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CMW
Grade Boring Concepts - 38Theory of OperationOnGrade Operator’s ManualTheory of OperationJob PlansFor most jobs, engineers will lay out the line and will establish the manhole locations, the depth the sewerline needs to run, and the recommended grade for the installation. On jobs where a connection is beingmade to an existing service, the position of the existing sewer line will dictate the depth.Engineers commonly base the plans for a sewer line on the invert, or flowline, of the installation. This is theelevation of the lower surface of the internal diameter of the installed pipeline. Drillers depths are from thecenter of the beacon which equates to the center of the installed pipe. If the engineer has specifiedelevations based on the invert, the driller must subtract half of the internal diameter of the pipe to beinstalled from the values given by the engineer to obtain the correct centerline depth for the housing.Laser PlaneThe laser emits a 360° plane. This allows for offsetlocation of the laser plane by the grade pole.The laser plane is also directional meaning that itwill slope up from horizontal in one direction anddown from horizontal in the other direction.e14om017t.epse14om023t.epsCMW
Page 1 and 2: OnGradeOperator’sManualCMW ® Iss
Page 3 and 4: Overview - 2Serial Number LocationO
Page 5 and 6: Overview - 4FCC Statement - Interna
Page 7 and 8: Foreword - 6OnGrade Operator’s Ma
Page 9 and 10: Contents - 8OnGrade Operator’s Ma
Page 11 and 12: Safety - 10GuidelinesOnGrade Operat
Page 13 and 14: Safety - 12Safety AlertsOnGrade Ope
Page 15 and 16: Controls - 14Grade PoleOnGrade Oper
Page 17 and 18: Controls - 16DetectorsOnGrade Opera
Page 19 and 20: Controls - 18OnGrade Operator’s M
Page 27 and 28: Conduct OnGrade Bore - 26OnGrade Pr
Page 29 and 30: Conduct OnGrade Bore - 28OnGrade Op
Page 31 and 32: Conduct OnGrade Bore - 30OnGrade Op
Page 33 and 34: Conduct OnGrade Bore - 32Extension
Page 35 and 36: Conduct OnGrade Bore - 34Take Readi
Page 37: Conduct OnGrade Bore - 36Drill-Thru
Page 41 and 42: Grade Boring Concepts - 40OnGrade O
Page 43 and 44: Systems and Equipment - 42Downhole
Page 45 and 46: Systems and Equipment - 44OnGrade O
Page 47 and 48: Systems and Equipment - 46Camera/Vi
Page 49 and 50: Systems and Equipment - 48LiftOnGra
Page 51 and 52: Complete the Job - 50Inspect Instal
Page 53 and 54: Complete the Job - 52OnGrade Operat
Page 55 and 56: Service - 54General CareOnGrade Ope
Page 57 and 58: Service - 56Change BatteriesOnGrade
Page 59 and 60: Specifications - 58OnGrade Operator
Page 61 and 62: Warranty - 60OnGrade Operator’s M
Page 63: Warranty - 62OnGrade Operator’s M

OnGrade Manual - Ditch Witch

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