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i' <br />PROJECT <br />LONGITUDE <br />ONE TWENTYO <br />I&VIA <br />ENGINEERING & DESIGN <br />SUBJECT <br />BY NJ <br />. <br />PROJECT NO. SHEET NO. <br />S220802-1 <br />4230 Grand Ave, Everett, WA 98203 <br />Foundation Stabilization/Jacking <br />DATE 9/13/22 <br />Ideal Foundation Systems 2-7/8" O Helical Pile (0.203-inch wall thickness) - Soil Capacity per ESR-3750 <br />DIGGA 6K Drive Head <br />Pressure <br />(psi) <br />Torque, T <br />_tbs <br />(Ft) <br />Torque Correlation Factor, Kt <br />Compression <br />(ft-') <br />UltimoteAxiol Compressive <br />Capacity, P. =K,`T <br />(kips) <br />Allowable Axro; Compressive <br />Capacity, P. =0.5`P„ <br />(kips) <br />500 <br />1,554 <br />9 <br />14.0 <br />7.0 <br />600 <br />1,865 <br />9 <br />16.8 <br />8.4 <br />700 <br />2,176 <br />9 <br />19.6 <br />9.8 <br />800 <br />2,486 <br />9 <br />22.4 <br />11.2 <br />900 <br />2,797 <br />9 <br />25.2 <br />12.6 <br />1000 <br />3,108 <br />9 <br />28.0 <br />14.0 <br />1100 <br />3,419 <br />9 <br />30.8 <br />15.4 <br />1200 <br />3,730 <br />9 <br />33.6 <br />16.8 <br />1300 <br />4,040 <br />9 <br />36.4 <br />18.2 <br />1400 <br />4,351 <br />9 <br />39.2 <br />19.6 <br />1500 <br />4,662 <br />9 <br />42,0 <br />21.0 <br />1600 <br />4,973 <br />9 <br />44.8 <br />22.4 <br />1700 <br />5,284 <br />9 <br />47.6 <br />23.8 <br />1800 <br />5,594 <br />9 <br />50.3 <br />25.2 <br />1900 <br />5,905 <br />9 <br />53.1 <br />26.6 <br />2000 <br />6,216 <br />9 <br />55.9 <br />28.0 <br />ri00 <br />6,527 <br />9 <br />S8.7 <br />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'lbs. 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 torque shall not <br />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 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 />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.) Fortorque readings between those listed, use the following equation to determine the allowable capacity: P. = (TW/2 <br />vii.) 1 kip=1,000lbs <br />L120 ENGINEERING & DESIGN <br />