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ESR-3969 I Most Widely Accepted and Trusted Page 8 of 10 <br /> TABLE 3—HELICAL BEARING PLATE CAPACITY(P3)-AXIAL COMPRESSIONta3 <br /> HELIX HELIX ALLOWABLE <br /> DIAM. THICKNESS HELIX PITCH CAPACITY3(P3) <br /> (IN) (IN) (IN) (KIPS) <br /> 8 0.375 3.0 63.4 <br /> 10 0.375 3.0 59.3 <br /> 12 0.375 3.0 62.6 <br /> 14 0.375 3.0 65.4 <br /> For SI: 1 inch=25.4 mm,1 kip=4.448 kN. <br /> 1For helical piles with more than one helix,the allowable helix capacity,P3,for the helical <br /> foundation systems,may be taken as the sum of the least allowable capacity of each <br /> individual helix. <br /> 2As described in Section 3.2.1 of this report,all helical bearing plates are made from same <br /> material,and have the same edge geometry,thickness and pitch. <br /> 3Allowable capacities include an allowance for corrosion over a 50-year service life. <br /> TABLE 4—SOIL CAPACITY(P4)-AXIAL COMPRESSION' <br /> GEOTECHNICAL RELATED PROPERTIES 27/8-INCH HELICAL PILE <br /> Mechanical Torsion Rating of shaft and helical plate(ft-lbs)3 8,840 <br /> Maximum Torque Per Soil Tests(ft-lbs)4 8,840 <br /> Maximum Installation Torque Rating(ft-lbs)5 8,840 <br /> Torque Correlation Factor,Kt(ff') 9 <br /> Maximum Ultimate Soil Capacity/Maximum Allowable Soil Capacity <br /> (P4)from Torque Correlations(kips)2 79.6/39.8 <br /> For SI: 1 foot=0.305 m, 1 lbf=4.448 N, 1 lbf-ft =1.356 N-m. <br /> 'Soil capacity(P4)must be determined per Section 4.1.5 of this report. <br /> 2Maximum ultimate soil capacity is determined from Puit=Kt x T based on the corresponding maximum <br /> installation torque rating for the specific pile model. Allowable soil capacity is determined from <br /> Pa=Pit/2.0 based on the corresponding maximum installation torque rating for the specific pile model. <br /> See Section 4.1.5 for additional information. <br /> 3Mechanical torsion rating is the maximum torsional resistance of the steel shaft. <br /> 4Maximum Torque Per Soil Tests is the maximum torque achieved during field axial verification testing that <br /> was conducted to verify the pile axial capacity related to pile-soil interaction. <br /> 5Maximum Installation Torque rating is the lower of the"mechanical torsion rating"and the"maximum <br /> torque per soil tests". <br /> ` 6.00.. <br /> 03,00 <br /> 1: 4.44 <br /> FIGURE 1—NEW CONSTRUCTION BRACKET(NCB) <br /> D 122 <br />