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6 of 31 <br /> A PROJECT NO. SHEET NO. <br /> 40.-- S210630-4XR <br /> i <br /> PROJECT 1434 GRAND AVE, EVERETT, WA 98201 <br /> LONGITUDE SUBJECT Foundation Stabilization/Jacking <br /> ONE TWENTY° <br /> ENGINEERING&DESIGN BY FY DATE 07/21/2021 <br /> Ideal Foundation Systems 2-7/8"l;3 Helical Pile(0.203-inch wall thickness)-Soil Capacity per ESR-3750 <br /> DIGGA 6K.Drive Head Torque Correlation Factor, Ultimate Axiitl Compressive Allowable Axial Compressive <br /> Torque, T <br /> Pressures) Kt Capacity Capacity <br /> ift(psi) Compression,(ft-3) P,=Kc*T,(kips) Pa =0.5•Pu,(kips) <br /> 500 all111211111111111 9 14.0 7.0 <br /> 600i 9 16.8 8.4 <br /> Tali 1f119M1 9 19.6 9-8 <br /> 800 1111111111190111111111119 22,4 11.2 <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 9 336 16.8 <br /> 1300 4,040 9 36.4 18.2 <br /> u _,.v ,_.___ ,M. 4,351 3 <br /> .�.„ 4,, A _ .A.F, .. ,. _.. ,.. . m. ,. ... . �, - .2 19.6�.. k. <br /> 140 <br /> 1500 4,662 9 <br /> 42_0 21.0 <br /> 1600 4,973 9 44_8 22.4 <br /> 1700 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•ibs.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•lbs_Final installation <br /> torque shall riot 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 toad 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 Ribs,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 lister,use the following equation to determine the allowable capacity:P,=(T`K4)/2 <br /> vii.)1 kip=1,000 lbs <br /> L120 ENGINEERING&DESIGN <br />