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7 of 24 <br /> PROJECT NO. SHEET NO. <br /> S210803-3XR <br /> PROJECT 500 Home Place Everett WA 98203 <br /> LONGITUDE SUBJECT Foundation Stabilization/Jacking <br /> ONE TWENTY° <br /> ENGINEERING&DESIGN BY JT DATE 08/07/2021 <br /> Ideal Foundation Systems 2-7/8"V Helical Pile(0.203-inch wall thickness)-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,0 -`) P.=Kr,(kips) P. =0.5'P,,,(kips) <br /> 500 1,554 9 14.0 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 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 33.6 16.8 <br /> 1300 4,040 9 36,4 18.2 <br /> „ Q 1400 ._ 4351. �d. ... 94 _ . ._., _ 39.2 d.. ,__ 19.6 . . , <br /> 1500 4,662 9 42.0 21.0 _' <br /> 1600 4,973 9 44.8 ?2_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 /> 1 6,216 __ <br /> 2000 9 55.9 28.0 <br /> _, _ <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 /> u_)Per Table 5A of ESR-3750,the maximum installation torque rating of a 2-7/8"(helical pile(0.203-inch wall thickness)is 8,300 ft'lbs.Per Ideal <br /> Manufacturing,Inc..the maximum installation torque rating of a 2-7/81 helical pile(0.203-inch wall thickness)is 8,000 ft'Ibs.Final installation <br /> torque shalt 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 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 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"K*)/2 <br /> vii.)1 kip=1,000 lbs <br /> L120 ENGINEERING&DESIGN <br />