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structural safety building a raised platform?

 
Posts: 126
Location: Western North Carolina
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A customer has asked us to build a raised platform onto which she will pitch a tent and sleep outside. Problem is = it is in deep woods and there is no way to get a tractor to dig post holes and the ground is rock so not possible to dig the holes by hand.

We can use those cement "feet" things that a treated post will just set in and set on the ground - But = problem is she wanted to the platform to be 8 feet in the air.

How do we know the heighth that is safe enough to just set the platform on the cement feet?

The measurements for the platform (tent pad) will be 10 feet by 10 feet.

Thank you.
 
Posts: 1141
Location: Central Wyoming -zone 4
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hugelkultur monies dog chicken sheep
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i would not trust those cement feet (if were thinking of the same thing) to hold that up, they dont even work well for a 5ft high porch

you c an buy post hole augers that are held by two people and gas powered, but even these are difficult to dig with at times, ive used them in thick clay and it took multiple tries with lots of soaking to get down to the proper depth (of 3ft) so that we could set the fence posts and fill with concrete...
 
Posts: 9002
Location: Victoria British Columbia-Canada
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Google images prodices hundreds of results for "tree platform with legs". Lots of ideas there. Bracing, Bracing, Bracing, Bracing. Make sure you include bracing.
 
Mary Ann Asbill
Posts: 126
Location: Western North Carolina
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Thank you. We are thinking perhaps this is a job too big for just us. We will refer the client to a few good builders who have the right equipment. Thank you.
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