Concrete light pole base
Concrete light pole base
(OP)
A local contractor has contacted us to review the proposed foundation design for some high mast sports light poles. The concrete poles are 95' tall and will be embedded 15' into the ground as per the manufacturer. The poles were to be set in a 4' diameter hole and filled with concrete. The butt diameter of the poles are 29". The existing soil conditions did not permit a nice smooth 4' dia. shaft due to high ground water and lots of cobbles, so the contractor now has a much larger hole that they will dewater and fill with concrete by tremie method. The question I have is how long does the pole need to be supported by the crane before the concrete has enough strength to keep it erect and plumb?Thanks in advance.





RE: Concrete light pole base
RE: Concrete light pole base
If so then the concrete is really only there to spread the load into a wider area of soil and is soon much higher in strength than the surrounding soil.
RE: Concrete light pole base
RE: Concrete light pole base
What do you plan to schedule for the wind and weather for the period your pole base cures/sets up?
It seems it would be cheaper to use Type III cement in the concrete to get an early set up and cure. This will save the contractor money so he can move the crane to othe poles.
Your foundation base is already much more than adequate the the original 48" with 9" of concrete cover.
At 6-8 hours, you have enough stability and could eliminate any cables/guy wires.
Dick
RE: Concrete light pole base
I wish I could control the weather for the contractor.
I've never used/spec'd the Type III cement so I am a little leary at this point because the contractor says that at least one of the holes is going to be very large in diameter by the time they get it cleaned up from the cave-in and estimates approximately 20+ yards of concrete. How will the large mass behave with the high early strength concrete? Also can that be used in a tremie placement? Thanks for the comments.
RE: Concrete light pole base
RE: Concrete light pole base
RE: Concrete light pole base
Tell them to use the high early strength concrete and then dont accept any claims for extras.
RE: Concrete light pole base
Thanks for everyone's input. I'll go with the type III and hopefully the contractor can get two done a day.
RE: Concrete light pole base
The usual expectation in this situation is that the contractor will employ their own PE to design this.
RE: Concrete light pole base
RE: Concrete light pole base