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Old 04-15-2010, 08:44 PM   #1
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using concrete filled tires for posts


I am building a workspace on uneven lava rock. I was thinking of filling tires with concrete to serve as the posts for the corners of the building and one in the middle with 4 x 4 attached to the concrete with metal brackets. Any ideas? Has anyone tried this? I think with some rebar reinforcement in the concrete and stacked two tires high for each post with a piece of plywood bolted to the tire underneath so that the concrete doesn't spill out it could work.

Any ideas about the structural integrity of this?

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Old 04-15-2010, 08:56 PM   #2
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using concrete filled tires for posts


Wouldn't it be easier to work with sonotubes -- it does not sound like the height will very much on these -- can you pin them into the lava somehow?

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Old 04-15-2010, 09:10 PM   #3
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using concrete filled tires for posts


Yea, but sono tube costs $, while used tires are free and are clogging up the land fills. I could always stack more tires on top of each other to get more stability. I think pounding some rebar into the lava rock could work, although my goal is to build something that could be moved if the building inspector ever visits me. Most standard concrete posts for 4 x 4 aren't very tall, and tires would allow for a wider base.
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Old 04-16-2010, 05:22 PM   #4
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using concrete filled tires for posts


i like it even tho it'll take mucho moro cemento !
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