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Old 04-18-2011, 08:00 PM
RLG RLG is offline
 
Join Date: Mar 2010
Posts: 187
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gfr concrete (glass fibre reinforced concrete) is generally not for piles unless it is an engineer request. it runs about double, triple price even and good luck anybody where you building will have it. This may sound crazy and i questinoned it before i saw it done, use the pwf post, but instead of concrete only set them in concrete in the hole (say 1' concrete if the hole is 4') and fill the rest with gravel, compact it with a sledge or something long and heavy, sounds hard but not. Gravel sheds the water away from the post, where as the concrete, once a little warn on top or your wood shrinks will allow moisture to penetrate between post and concrete, eventually frost will bust that concrete apart or your post will rot. our engineers have started to design all pwf structures this way, good luck looks like a good start has already been made.
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