Yes, I agree, deflections are most important (and accurate) during service loads. But if we consider wind loads, then strength design is for the 50 year wind event, which may be once in a lifetime. And this design wind may control the overall design of the member, rather than service load...
Can someone say why we continue to use the Elastic Modulus, E, when we're doing deflection analysis with compact sections. It seems to me that with p-delta moments, especially on a beam-column, you'd have a modulus less than 29000 ksi because you'd be on the flat portion of the stress-strain...
When a concrete guy anchor is in action there's skin friction on the sides, the top, the front face, and also on the bottom if uplift is not too great. The friction force for a cohesionless soil is:
f = K * effective_overburden * tan (delta)
where delta = 2/3 *internal friction
I think you...
