DIY Doctor

Small cabin foundation near lake

Postby grieper » Sun Apr 15, 2007 1:13 pm

We plan on building a small 12' x 16' cabin close to the lake (~10ft. from the lake). I was hoping to get everyone's opinion on the foundation plan. We plan on inserting 6"x6" treated posts 40" into the ground and cementing in the hole around the post. These posts would spaced every 4' around the outside and in the center of the cabin. The tops of the posts would be leveled 2' above the ground and this is what we'd construct the floor system on, so the cabin is raised 2 ft. above the ground.

The soil here starts to get pretty muddy less than a foot down and gets even wetter the further down you go. Does this sound like a safe foundation for a small cabin in this area? Please let me know any advice/criticism you have on the issue. Thanks for your help!
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Simply Build It

Postby thedoctor » Sun Apr 15, 2007 7:02 pm

Placing timber in wet ground is never ideal. Its why fences blow over when the posts start to rot. Posts are pressure treated to take the treatment into the timber a few mm, the water will very soon soak in well beyond the treatment. It would be much better if you could concrete posts into the ground and, using a little formwork, finish the topof each concrete "post" 6 inches above ground. Then you can bolt on some proprietory timber post holders and keep the posts out of the water.
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