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6 of 23 <br /> A PROJECT NO. SHEET NO. <br /> i �- S230503-1 XR <br /> ATi <br /> PROJECT 216 73rd St SW Everett WA 98203 <br /> LONGITUDE SUBJECT Foundation Stabilization/Jacking <br /> ONE TWENTY° <br /> ENGINEERING&DESIGN BY JT DATE 07/13/2023 <br /> Ideal Foundation Systems 2-7/8"0 Helical Pile(0.203-Inch wall thickness) Soil Capacity per ESR•3750 <br /> DIGGA 10K Drive Torque, Torque Correlation Factor Ultimate Axial Compressive Capacity, Allowable Axial Compressive Capacity, <br /> Head Pressure T Kr(Compression/ Pv=Ke•T P.=0.5•P„ <br /> (Psi) (ft•!bs) (n'') (kips) (kips) <br /> 500 1,740 9 15.7 7.8 <br /> 600 2,088 9 18,8 9.4 <br /> 700 2,436 9 21.9 11.0 <br /> 800 2,784 9 25.1 125 <br /> 900 3,132 9 28.2 14.1 <br /> 1000 3,480 9 31.3 15.7 <br /> 1100 3,828 9 34.5 17.2 <br /> 1200 4,176 9 37.6 18.8 <br /> 1300 4,524 9 40.7 20.4 <br /> 1400 4,872 9 43.8 21,9 <br /> 1500 5,220 9 47.0 23.5 <br /> 1600 5,568 9 50.1 25.1 <br /> 1700 5,916 9 53.2 26.6 <br /> 1800 6,264 9 56.4 28.2 <br /> 1900 6,612 9 59.5 29.8 +See Note viii. <br /> 2000 6,960 9 62.6 31.3 <br /> 2100 7,308 9 65,8 32.9 <br /> 2200 7,656 9 68.9 34.5 <br /> 2300 8,004 9 72.0 36.0 <br /> 2385 8,300 9 74.7 37.3 •See Note II. <br /> I.)DIGGA 10K Drive Head differential pressure display to torque output has been pulled from the attached conversion charts provided by DIGGA. <br /> ii.)Per Table 5A of ESR-3750 and Ideal Manufacturing Inc.,the maximum installation torque rating of a 2.7/8"0 helical pile(0.203-inch wall thickness)is 8,300 <br /> ft"lbs.Final installation torque shall not exceed this value. <br /> lil.)Piles shall reach a torque that correlates with an allowable capacity that meets or exceeds the maximum allowable load demand as listed in the structural <br /> package,but shall not exceed the maximum allowable capacity for any part of the pile assembly. <br /> iv.)Refer to ESR-3750 and Ideal Manufacturing,Inc.documents for additional information and requirements. <br /> v.)Definitions per ESR-3750: <br /> T=Final Installation torque in ft•Ibs;the last torque reading taken during pile installation,using,for example,the torque reading <br /> instruments connected to the Installation equipment. <br /> If..=Torque correlation factor per ESR-3750 <br /> P„=Ultimate axial compressive capacity(in kips)of helical pile <br /> P.=Allowable axial compressive capacity(in kips)of helical pile <br /> vi.)For torque readings between those listed,use the following equation to determine the allowable capacity:P._(T•K.J/2 <br /> vii.)1 kip=1,000 lbs <br /> viii.)Per Note 3 of Ideal Group Dwg No.:278TFG dated 4/23/20,the ultimate structural capacity for the 2 7/8"TRU-FORCE Underpinning Bracket Is limited to <br /> 60 kips. <br /> L120 ENGINEERING&DESIGN <br />