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  1. #1
    Join Date
    Oct 2002
    Posts
    711

    Sink Holes in Fl.

    I am hoping to hear from contartctors that are familiar with home building in Florida.

    I cannot understand how anyone can fall through a floor when the ground gives way. Explain it to me.

    In this area of Texas, concrete foundations have thick beams every 20 feet with rebar at a 24" grid, all tied together. Even if itis tunnelled underneath, as plumbers sometime do, the rebar would hold the concrete together. At the very least, how could a person or a bed fall past this rebar reinforcement.

    Most all the weight on a small house is at the perimeter walls. The house, in Florida sinkhole incident, was fully intact.

    Maybe Florida construction is different.

  2. #2
    Join Date
    Feb 2007
    Location
    Helena, Montana
    Posts
    1,286
    Saw a Nat Geo progam one time about all of the underground water ways down there in Florida. There is a butt load of them. They were everywhere or at least everywhere they filmed. Kind of scary building with that underneath you.
    "Fortunately, I keep my feathers numbered for just such an emergency." Foghorn Leghorn

  3. #3
    Join Date
    Aug 2006
    Location
    Panama City, FL
    Posts
    691
    Quote Originally Posted by timjimbob View Post
    I am hoping to hear from contartctors that are familiar with home building in Florida.

    I cannot understand how anyone can fall through a floor when the ground gives way. Explain it to me.

    In this area of Texas, concrete foundations have thick beams every 20 feet with rebar at a 24" grid, all tied together. Even if itis tunnelled underneath, as plumbers sometime do, the rebar would hold the concrete together. At the very least, how could a person or a bed fall past this rebar reinforcement.

    Most all the weight on a small house is at the perimeter walls. The house, in Florida sinkhole incident, was fully intact.

    Maybe Florida construction is different.
    I understand exactly what you're saying. That unsupported section of the slab should not fall away like that. Of course, that house looked to be 35+ years old, so codes were different, maybe. I've seen slab erosion where a whole corner of the house is undermined and hanging out in mid-air, and it didn't even crack the stucco.
    You can't learn a thing with your mouth open.

  4. #4
    Join Date
    Mar 2004
    Location
    SE Michigan
    Posts
    16,632
    Maybe the house didn't have a slab. Maybe it had a sand floor...some people roll funny that way down there.
    "If anybody can draw on the power, where do we put the meter?" - JP Morgan before pulling Tesla funding

  5. #5
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    2,242
    I often wondered what happens when you drill for oil , by the millions of barrels , which has to be leaving a void , if the earth would one day begin to implode ....

  6. #6
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    21,317
    A 30 foot wide hole is pretty substantial.

    I doubt seriously that a bit of rebar will hold your slab up over a hole of that size.

  7. #7
    Join Date
    Oct 2009
    Posts
    879
    Reminds me of a subdivision I heard about. Put the rebar in the framing, call for inspection, pass, move the rebar to the next hole and pour,
    Never argue with a crazy man.

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