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. 8 of 24 <br /> A PROJECT NO. SHEET NO. <br /> tt <br /> /441,......0 S200831-1 <br /> Te4514 Seahurst Ave, Everett, WA 98203 <br /> PROJECT <br /> LONGITUDE SUBJECT Foundation Stabilization/Jacking <br /> ONE TWENTY ZT 11/20/2020 <br /> ENGINEERING&DESIGN BY DATE <br /> ideal Foundation Systems 2-7/811 Helical Pile(0:203-indi wall thidrnessj-Soil Capacity per ESR-3750 <br /> DIGGA 6K Drive Head Torque Correlation Factor, Ultimate Axial Compressive Allowable Axial Compressive <br /> Torque, T <br /> Pressure Kt Capacity Capacity <br /> (ft*lbs) <br /> !psi) Compression,(ft'`) P.=VI;(kips} P,=0.5•Pn,(kips) <br /> 500 1,554 9 14.€? 7.0 <br /> 600 1,865 9 16.8 8.4 <br /> 700 2,176 9 19.6 9.8 <br /> 800 2,486 9 22.4 112 <br /> 900 2,797 9 25.2 12_6 ' <br /> 1000 3,108 9 28_0 14.0 <br /> 1100 3,419.. ... 9 30,8 15.4 <br /> 1200 3,730 9 33. .6 16.8 <br /> 1300 4,040 9 36.4 18.2 <br /> 1400 4,351 9 39.2 19.6 <br /> 1500 4,662 9 42.0 21_0 <br /> 1600 4,,973 9 44.8 22.4 , <br /> 1700 a 5,284 9 47.6 23.8 <br /> 1800 5,594 9 50.3 25.2 <br /> 1900 5,905 9 53.1 26,6 <br /> 2000 6,216 9 55.9 28.0 <br /> MAX 2100 6,527 9 58,7 29.4 <br /> i.)DIGGA 6K 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,the maximum installation torque rating of a 2-7/8"0 helical pile(0.203-inch wall thickness)is 8,300 ft`1bs.Per Ideal <br /> Manufacturing.Inc.,the maximum installation torque rating of a 2-7/8"0 helical pile(0.203-inch wall thickness)is 8,000 ft`Ibs_final installation <br /> torque shall not exceed the lesser of these limiting values. <br /> iii_)Piles shall reach a torque that correlates with an allowable capacity that meets or exceeds the maximum allowable road demand as listed in the <br /> structural 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 <br /> torque reading instruments connected to the installation equipment. <br /> Kt=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*1(l)/2 <br /> vii)1 kip=1,000 lbs <br /> I <br /> L120 ENGINEERING&DESIGN <br />