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  • 1.  Different between embedded Beam and a drop down beam

    Posted 06-16-2017 02:00 PM

    Can an embedded Beam act as a drop-down Beam (secondary beam)  which is dividing a slab panel



  • 2.  RE: Different between embedded Beam and a drop down beam

    Posted 06-19-2017 11:32 AM
    Your question is not very clear.  Can you be a little bit more descriptive?  Generally a drop beam will be more susceptible to stability factors than an "embedded" or flush beam will, because the flush beam is laterally braced by the slab or floor system, while the drop beam is not as well braced.

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    Andrew Holmes P.E., L.S., M.ASCE
    Consulting Engineer
    Melbourne FL
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    Original Message


  • 3.  RE: Different between embedded Beam and a drop down beam

    Posted 06-20-2017 02:45 PM
    Hello
    The embedded beam is practically doing nothing due to the lack of difference in stiffness between the slab and the beam. Adding more rebars in the embedded beam will not make the beam stiff enough to carry loads from the slab.

    Thanks.

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    Sayed Attaalla PhD, P.E., S.E., M.ASCE
    Peter T. Erdelyi & Associates
    Los Angeles CA
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    Original Message


  • 4.  RE: Different between embedded Beam and a drop down beam

    Posted 06-21-2017 09:38 AM
    Your question is not clear.  To better answer your question we need to know if the beams your discussing are steel or concrete. 

    For steel beams a drop beam is normally fully below the slab and carries the load from the slab by several mechanisms.  An embedded steel beam can serve several purposes.  The normal purpose I use embedded steel beams is for fire protection of the structure.  Since the embedment is for fire protection, the concrete is not counted on to support the structure. 

    Using concrete beams, a drop beam is installed below the slab and carries the loads from the slab.    The slab furnishes little lateral support.  Embedding a concrete beam with the floor slab allows the beam and slab to function together as a tee beam, strengthening the structure laterally.

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    Kenneth Clark P.E., M.ASCE
    Civil Engineer
    Oklahoma City OK
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    Original Message


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