Quote:
Originally Posted by bomberjet
Are screw piles the answer?? I'm not an expert on the subject, but have heard numerous things about not using them. Something about the screw going through the clay can cause issues with capacity. As in the screw just chews up the soil and you really have nothing supporting the load.
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A 12" screw pile will support the same amount as a 12" concrete pile, they are significantly cheaper, the top is the same as a telepost, so they provide adjustability if there is movement. I have used screw piles on the last few projects that I have done, and at under $300 a piece, they cost less and do the same job.
Clay soil moves, concrete is very rigid and cannot take some of those stresses. IMO, there is no reason to fight the movement,