Transmission And Substation Foundations - Technical Design Manual (TD06088E)

Figure 7-19: Bending Moment vs Depth

These results show that the piles will be able to carry the required shear capacity with 0.9” deflection and 114 kip-in of moment. This deflection is generally acceptable for transmission structures and the moment is less than the 0.6 Mp used in standard design. Recommendation: 1. Install 9-RS4500.337 Helical Piles a. Helix Configuration: 10/12/14/14/14/14 b. Installation torque: 16,700 ft-lbs c. Locate piles per attached Pile Layout (Figure 2)

DESIGN EXAMPLES

d. Estimated Embedment: 50 ft e. Minimum embedment: 20 ft

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