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- 7 of 21 <br /> PROJECT NO. SHEET NO. <br /> S210421-2XR <br /> PROJECT 1918 Lombard Ave Everett WA 98201 <br /> LONGITUDE SUBJECT Foundation Stabilization/Jacking - <br /> ONE TWENTY° <br /> ENGINEERING&DESIGN BY JT DATE 06/28/2021 <br /> Ideal Foundation Systems 2-7/8"$Helical Pile(0.2l13-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 (ft•lbs) Ki Capacity Capacity <br /> (psi) Compression,.(ft j ) P,=Kx T,(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 /> 1400 4,351 9 39.2 19.6 <br /> 1500 4,662 9 42.0 21 t3_ <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"13 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 ftibs_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 load 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 ftlbs;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*Ka/2 <br /> vii_)1 kip=1,000 lbs <br /> L120 ENGINEERING&DESIGN <br />