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ESR-3969 I Most Widely Accepted and Trusted Page 8 of 10 TABLE 3—HELICAL BEARING PLATE CAPACITY(P3)-AXIAL COMPRESSION''" HELIX HELIX ALLOWABLE DIAM. THICKNESS HELIX PITCH CAPACITY3(P3) (IN) (IN) (IN) (KIPS) 8 0.375 3.0 63.4 10 0.375 3.0 59.3 12 0.375 3.0 62.6 14 0.375 3.0 65.4 For SI: 1 inch=25.4 mm, 1 kip=4.448 kN. 'For helical piles with more than one helix,the allowable helix capacity,P3,for the helical foundation systems,may be taken as the sum of the least allowable capacity of each individual helix. 2As described in Section 3.2.1 of this report,all helical bearing plates are made from same material,and have the same edge geometry,thickness and pitch. 3Allowable capacities include an allowance for corrosion over a 50-year service life. TABLE 4—SOIL CAPACITY(P4)-AXIAL COMPRESSION' GEOTECHNICAL RELATED PROPERTIES 27/8-INCH HELICAL PILE Mechanical Torsion Rating of shaft and helical plate(ft-lbs)3 8,840 Maximum Torque Per Soil Tests(ft-lbs)4 8,840 Maximum Installation Torque Rating(ft-lbs)5 8,840 Torque Correlation Factor,Kt(ft-1) 9 Maximum Ultimate Soil Capacity/Maximum Allowable Soil Capacity (P4)from Torque Correlations(kips)2 79.6/39.8 For SI:1 foot=0.305 m, 1 Ibf=4.448 N, 1 lbf-ft =1.356 N-m. 'Soil capacity(P4)must be determined per Section 4.1.5 of this report. 2Maximum ultimate soil capacity is determined from Pu„=Kt x T based on the corresponding maximum installation torque rating for the specific pile model. Allowable soil capacity is determined from Pa=Pmt/2.0 based on the corresponding maximum installation torque rating for the specific pile model. See Section 4.1.5 for additional information. 3Mechanical torsion rating is the maximum torsional resistance of the steel shaft. "Maximum Torque Per Soil Tests is the maximum torque achieved during field axial verification testing that was conducted to verify the pile axial capacity related to pile-soil interaction. 5Maximum Installation Torque rating is the lower of the"mechanical torsion rating"and the"maximum torque per soil tests". 8.00 e'3.00 .se _I 3 ;.1 N 6. HMIIIINIMIIIItnillIll____,T ,,_ ,, . e-n . . -- 1/4. At.',iill'' C r. a\ ! 4.aa 0143i FIGURE 1—NEW CONSTRUCTION BRACKET(NCB)