Transmission And Substation Foundations - Technical Design Manual

SECTION 7: DESIGN EXAMPLES Design Example 14

Solution (12) helical piles, installed at 5 degrees from vertical with steel grillage RS5500.361 w/14, 16, 18 & 18-inch diameter helices, installed 58 feet deep Minimum Torque: T = Q ult /K t Where Q ult = 256 kip and K t = 5 (RS5500) = 256/5 = 51 ft∙kip

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