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Crawford, Colorado Posts: 177
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Little Rock, AR Posts: 1131
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What is the purpose of these?
[#2] Posted: 08/26/2008 - 6:55:44 PM |  | |
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Forgetting about anything else, the material in the little bag looks like vermiculite, at least as near as I can tell. Why it would be placed around the foundation is a mystery to me.
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Kevin
"Politicians are interested in people. Not that it is always a virtue; fleas are interested in dogs." P.J. O'Rourke
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Oak Park, IL Posts: 283
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Crawford, Colorado Posts: 177
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DeWitt, Mi Posts: 3305
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What is the purpose of these?
[#5] Posted: 08/27/2008 - 4:10:05 PM |  | |
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it could be a mouse bait, but more likely just a goofy decsicant. sure looks like vermiculite. WARNING: inspector lore' I have seen vermiculite used as a carrier for DDT. Actually done it myself. and, no I did not taste it!
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Les
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Oak Park, IL Posts: 283
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Comer, GA Posts: 1000
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What is the purpose of these?
[#7] Posted: 08/27/2008 - 6:59:32 PM |  | |
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If you were in New Orleans I might guess it's something Voodoo related. Got my mojo workin' but it just won't work on you.
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Crawford, Colorado Posts: 177
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What is the purpose of these?
[#8] Posted: 08/28/2008 - 06:27:03 AM |  | |
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I hope this picture helps explain. The sometimes extremely expansive soils in this area can be avoided by this design. I could not determine exactly, but this home may be supported by only 30-40 sq. ft. of concrete columns extending to a stable soil strata. The concrete on the right in the picture is one of those column portions. The piece of 2x8 form material should have been removed when the forms were stripped. The paper void is to the left. The white stuff on the ground is a patch of alkalai.Quote: Originally posted by JesseQuote: Originally posted by mridgeelk My question involving a soils engineer is why the pad is on soil that is being avoided by the use of the paper filler under much of the foundation.
The paper filler is avoiding the soil? I'm still not following.
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Collins, NY Posts: 3143
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What is the purpose of these?
[#9] Posted: 08/28/2008 - 07:43:09 AM |  | |
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I still don't get it. If the soil is so unstable that the house needs to be constructed on caissons, why is there a perimeter stemwall? And how is paper fill supposed to carry it? Also, the support post in the last pic in your original post looks wrong in at least 3 different ways: too small, untreated wood, not anchored to the pier.
Tom
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Tom
http://clearcreekhomeinspection.com/
Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things. Dr Joe Lstiburek |
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Kenmore, WA Posts: 15394
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Collins, NY Posts: 3143
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What is the purpose of these?
[#11] Posted: 08/28/2008 - 11:16:17 AM |  | |
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I think he's referring to a grade beam on pier foundation.
That makes sense, but, around here we would end the piers below the frost line, place the grade beam, and build stemwalls on top of that. The last one of these I worked on was 8' from the steel breakwall holding the lot back from Lake Erie.
The post that bothers me is the one built up from 2x4's under/around the girder in the last picture in the first post. It's creative, but I don't like it.
Tom
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Tom
http://clearcreekhomeinspection.com/
Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things. Dr Joe Lstiburek |
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Crawford, Colorado Posts: 177
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Kenmore, WA Posts: 15394
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What is the purpose of these?
[#13] Posted: 08/28/2008 - 3:18:19 PM |  | |
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Here's a sketch of what I was referring to - they're used where unstabile/expansive soils are common.
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OT - OF!!!
M.
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Crawford, Colorado Posts: 177
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What is the purpose of these?
[#14] Posted: 08/29/2008 - 10:19:42 AM |  | |
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If a home was built on expansive soil using the sketch design there would most likely be some sort of void placed under the concrete beams. Another design to deal with some expansive soils is to overexcavate, as in the case I am familiar with, three feet and then compact class 6 roadbase back to the original elevation. A convential foundation was then constructedQuote: Originally posted by hausdokHere's a sketch of what I was referring to - they're used where unstabile/expansive soils are common. Image Insert: 108.97 KBOT - OF!!! M.
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'Tis hard to say, if greater Want of Skill Appear in Writing or in Judging ill... A. Pope |
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