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Galaxyhunter
scholastic sledgehammer
Reged: 01/02/06
Posts: 929
Loc: Northern Illinois
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Re: Questions about Sonotube based piers
07/03/08 07:59 PM
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Take a look at the four 12" sonotubes on the back side of the main slab. It is hard to see from this angle, but I fastened them to a small sheet of 3/4" OSB. I placed the OBS / sonotube assembly over the hole I bored into the ground. I used about 8 tent stakes to holed each piece down. Then I poured through the top of the tubes. Each of the holes were bored 4' down & poured about 2' up into the tubes. The soupier you make the mix, the more chance of a leak where the OSB meets the ground.
http://www.hawkeye-observatory.com/misc/Pillers.jpg
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Carl
Hawkeye Observatory
Observatory - "Hawkeye"
Scope - 18"f4.5 on a GEM
Drive - Sitech Technology
DSC - Sky Commander
Planetarium - MegaStar
Camera - ST2000XM - AO-8
Desire - comes & goes
Talent - ZERO, NONE, NADA (But I can Wish)
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