What is piered beam slab foundation?

Discussion in 'Building Construction' started by metin, Mar 8, 2006.

  1. metin

    metin Guest

    I am in the process of buying a house in the northern Dallas. Due to
    ground movements, expansive clay, in the area, house walls often crack.
    The seller told me that his house, built in 1997, has a piered beam
    slab foundation. According to the home inspector, the house is a
    perfect example of a slab foundation. I am confused. To help me out,
    the seller gave me the pictures of the house during foundation. Then I
    have two questions:

    1. Is there a foundation type called "piered beam slab"?
    2. How can we understand that a foundation is "piered beam slab" by
    looking at its pictures?

    Thanks for the info.
    Metin
     
    metin, Mar 8, 2006
    #1
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  2. metin

    DanG Guest

    I don't recognize the term "piered beam slab".
    Your realtor may be trying to say that it is a slab home (no
    basement, no crawl space).

    A pier is a drilled hole in the ground that is drilled to a
    suitable depth to provide sufficient bearing for the structure.
    This may or may not be bed rock.

    A grade beam is a structural element that carries the building
    load (usually outside walls) to the piers. A normal spread
    footing carries the loads on a "footprint" at frost depth. Grade
    beams usually have carton forms (4" typical, structural cardboard
    boxes strong enough to pour concrete on and eventually rot away)
    under them to prevent contact with expansive soils. These grade
    beams bear on the top of the piers.

    A slab at grade is a uniform thickness of concrete that uses the
    soil under it as its bearing form.

    Many homes in your area have post tension slabs, an alternate
    method of reinforcing the slab.

    It is possible to pour a floor on carton forms so it does not
    touch the soil, often with a waffle type grid that can rest on
    pier heads. This may be what your seller is talking about.
    ______________________________
    Keep the whole world singing . . . .
    DanG (remove the sevens)




    "metin" <> wrote in message
    news:...
    >I am in the process of buying a house in the northern Dallas.
    >Due to
    > ground movements, expansive clay, in the area, house walls often
    > crack.
    > The seller told me that his house, built in 1997, has a piered
    > beam
    > slab foundation. According to the home inspector, the house is
    > a
    > perfect example of a slab foundation. I am confused. To help
    > me out,
    > the seller gave me the pictures of the house during foundation.
    > Then I
    > have two questions:
    >
    > 1. Is there a foundation type called "piered beam slab"?
    > 2. How can we understand that a foundation is "piered beam slab"
    > by
    > looking at its pictures?
    >
    > Thanks for the info.
    > Metin
    >
     
    DanG, Mar 8, 2006
    #2
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  3. metin

    Guest

    I think the realtor is talking about what I call a Pier and Beam
    foundation.
    If this is so, the concrete slab that is the floor of the house is
    reinforced to span between reinforced concrete beams which are
    supported on reinforced concrete piers. The piers rest on a layer of
    rock that is below the expansive clay and the entire structure is
    designed to stand by itself and free of the movement of the ground.
    This is an excellent system.

    There is normally no way you can look at the house and tell what the
    structural system is. You want to have a signed statement from the
    seller and realtor that that is true. A building permit or engineer's
    drawings or a report from an engineer would be insurance.

    TB
     
    , Mar 8, 2006
    #3
  4. metin

    metin Guest

    Thanks for 3 replies in the last 12 hours to my question on "piered
    beam slab" foundation. One of the replies imply that I might have
    misheard what the realtor said. I assure you that this is not the
    case. She said "piered beam slab" foundation in writing. The house is
    listed in the MLS as piered beam slab. So mine is not a case of
    mishearing.

    Furthermore, I serached engineering databases to find this term of
    piered beam slab. No such foundation exists in the engineering
    literature. My current conclusion is that the realtor does not know
    what she is talking about. I shall go to the builder of the house
    although the realtor is not very willing me to connect me with the
    builder. Any suggestion and info are appreciated to solve this "piered
    beam slab" mystery.
    Thanks,
    Metin
     
    metin, Mar 8, 2006
    #4
  5. metin

    Verizon Guest

    It's possible that they were referring to a type of slab required in areas
    where there is the presence of concrete termites. In these areas you need
    to elevate the concrete slab at least 12" above the ground on heavy posts
    and support the slab on heavy beams (carries the floor load from
    post-to-post.)

    Of course I could be wrong about this. Those 'brick & motor termites may
    not get that far south......
    Dennis

    > Furthermore, I serached engineering databases to find this term of
    > piered beam slab. No such foundation exists in the engineering
    > literature. My current conclusion is that the realtor does not know
    > what she is talking about. I shall go to the builder of the house
    > although the realtor is not very willing me to connect me with the
    > builder. Any suggestion and info are appreciated to solve this "piered
    > beam slab" mystery.
    > Thanks,
    > Metin
    >
     
    Verizon, Mar 8, 2006
    #5
  6. metin

    Al Bundy Guest

    "metin" <> wrote in
    news::

    > Thanks for 3 replies in the last 12 hours to my question on "piered
    > beam slab" foundation. One of the replies imply that I might have
    > misheard what the realtor said. I assure you that this is not the
    > case. She said "piered beam slab" foundation in writing. The house is
    > listed in the MLS as piered beam slab. So mine is not a case of
    > mishearing.
    >
    > Furthermore, I serached engineering databases to find this term of
    > piered beam slab. No such foundation exists in the engineering
    > literature. My current conclusion is that the realtor does not know
    > what she is talking about. I shall go to the builder of the house
    > although the realtor is not very willing me to connect me with the
    > builder. Any suggestion and info are appreciated to solve this "piered
    > beam slab" mystery.
    > Thanks,
    > Metin
    >



    > The house is listed in the MLS as piered beam slab. So mine is not a

    case of mishearing.

    She got it from the MLS listing. Look at the bottom of each MLS listing
    and you will find as in this example:

    "NOV-01-2005 * Information Deemed Reliable But Not Guaranteed *
    Made by InnoVia MLS"


    So legally, McRib wrapper is worth as much as what the MLS listing
    states.
     
    Al Bundy, Mar 9, 2006
    #6
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