I've been questioned by Clients lately on the depths of my drilled piers and was curious how others handle determining their depths. Their past engineers would take them 10-15' deep and no further, so I'm wondering if I'm being too overconservative. These designs are typically small vertical...
This should be simple, but I'm having some troubles. Looking through the FHWA LRFD Steel Bridge Design Example http://www.fhwa.dot.gov/bridge/lrfd/fhwanhi04041_steel.pdf On page 3-13 (page 124 of 648), they go through and calculate the section properties for the girder only, 3n, and n. I cannot...