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Portland, ND | Verizon put up a 250' cell tower on one of our fields last year, a three leg free standing unit. All the tower company did was dig a hole about 5' deep, fill it with rebar, (i think 3/4 rebar, 1' spacing, 2 layers) and dump cement about 2' thick on top of it. They brought up 3 footings to ground level.
They said it was rated for wind load of 90 mph with 1/2" of ice on it.
It was a simple setup, and they didn't have to fight with groundwater.
It looked like the pictures, but upside down. The dirt fill was on top of the large slab, and the cement columns came up to ground level.
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Grain Leg tower foundation??
