Light Pole foundation design

[braves25]

Question regarding EPA and loads to foundation. Let's say I have a pole with several fixtures each with their own EPA. When designing the foundation, would I calculate the wind pressure for my location (say 25 psf) and then would I take this wind pressure and multiply it times the EPA of each fixture? Say the fixtures were 15' above grade...I'd have a force from the EPA*wind pressure and then distance to the ground for my moment on my foundation. Is this correct?

 

[JAE]

Yes, plus the wind on the pole itself.

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[JoelTXCive]

Yes, wind on the fixtures and also wind on the pole.

The moment arm length is a subject of discussion too.

Are you connecting to a drilled shaft? If so, we assume there will be some deflection at the top of the shaft, so therefore you have some additional distance before you reach a fixed condition. This 'depth to fixity' will increase your moment arm length. I think 3 drilled shaft diameters is a common design assumption.

So, if you have a 15ft pole and an 18" drilled shaft....The moment arm from the light fixtures would be (15'+3*1.5') = 19.5ft. The moment arm from the pole loading would be a little larger too.

 

[braves25]

Thank you for the replies....most helpful! Have a great day.