b'Design Example 7Motor Output TorqueDesign 1A: The heavy weight new construction Lookinginthe ModelNumbercolumnofpiledesignpresentedinDesignExample1 Table 2, the X12K5 Torque Motor data is found.requiredshafttorsionof 6,700ft-lbappliedto Readingtotherightthevalueforthe Motorthe 2-7/8 inch diameter Torque Anchor shaft to ConversionFactor,K,forthismotorisachievetheultimatecapacityrequirementof determined to be K = 4.20.60,000 pounds.Design 1B: In Design Example 1B, weak soil 3. Motor Output Torque:Once the differentialwas present and thetorsionrequirementwas pressureacrossthehydraulictorquemotorhasdeterminedtobe 6,900ft-lbona3-1/2inch been calculated (Step 1) and the value for Kdiameter tubular shaft to be able to achieve the determined (Step 2), the values can be used insame 60,000 pound ultimate pile capacity. Equation 3 to determine the actual Motor OutputTorque that is applied to the pile shaft at duringProject Details Provided from the Field: installation. New Building2 story house with basement Equation 3: T = K x P Ultimate Capacity = 60,000 lb Where, Torque Motor Available = Pro-Dig X12K5 T = Hydraulic Motor Output Torque - ft-lb Pressures averaged over final three feet of depth K = Torque Motor Conversion FactorDesign 1Average Pressures at termination depth, (Table 2Chapter 4Also see below.)2-7/8 dia = 1,900 psi at inlet & 200 psi at outlet P = Motor Pressure Differential = p inp outDesign 1BAverage pressures at termination depth, Design Example 1: Confirm proper installation3-1/2 dia = 2,150 psi at inlet & 200 psi at outlet torque for the 2-7/8 diameter shaft.Equation 3introducedinChapter 4isusedto TDesign 1 = 4.20 x (1,700 psi200 psi)convert pressure differential across the hydraulic TDesign1= 7,140 ft-lbgear motor into shaft output torque. Verified - 7,140 ft-lb 7,100 ft-lb - O.K.Equation 3:Motor Output Torque Design Example 1B: Confirm proper installationT = K x P torque for the 3-1/2 diameter pile shaft that was1.DifferentialPressures,P:Beforeusing installed into weak soil.Equation 3, the pressure differential, or P, must T Design 1B= 4.20 x (2,150 psi200 psi)be determined from the field.The Motor Torque TDesign 1B = 8,190 ft-lbConversion FactorK must also be identified Verified - 8,190 ft-lb 8,000 ft-lb - O.K.for the Pro-Dig X12K5 that is being used. End Design Example 6The Differential Pressure, P,across the motor is determined asfollows: Table 2.Hydraulic Torque Motor SpecificationsP = Inlet psiOutlet psiP =p inp out Model Torque Motor Torque Maximum Output Hex WeightIllustration Number Output Conversion Pressure Speed Output lb.P for Design Example 1: ft-lb FactorK psi rpm ShaftP Design 1=1,900 psi200 psiP Design 1 = 1,700 psi L6K5 6,335 2.53 2,500 16 13.8 2 132P for Design Example 1B: L7K5 7,644 2.55 3,000 35 32.8 2-1/2 363P Design 1B=2,150 psi200 psi PRO-DIGP Design 1B= 1,950 psi X9K5 9,663 3.22 3,000 35 26 2-1/2 3652.MotorTorqueConversion X12K5 12,612 4.20 3,000 40 23.5 2-1/2 366Factor, K:The Motor Torque T12K 5,597/ 2.24/4.85 2,500 65 70/32 2-1/2 or 382Conversion FactorK is found 12,128 2-3/4onTable 2inChapter 4.(A X16K5 16,563 5.52 3,000 40 17.9 3 565portionofthetableis shownright.) X20K 20,670 6.89 3,000 40 14.3 3 571ECP Technical Design ManualTorque Anchor Design Examples2021 Earth Contact Products, L.L.C.2021-09 Chapter 5Page 103 4,500 1.5 3,000 10 10 2 Dia Keyed 68Eskridge B26 16:1 All rights reservedB5016- 5,000 1.71 3,000 20 24 2 15021F54'