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Structural Engineering Forum Of Pakistan


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Showing content with the highest reputation on 01/10/2017 in all areas

  1. 2 points

    Modelling raft using ETABS and SAFE

    SAFE can include these inverted beams as line elements or shell elements.
  2. 1 point

    Detailing Software

    ETABS has a built in detailing feature. https://www.csiamerica.com/products/etabs/features Here are a few others. https://www.s-cube.in/ProductRCDC.aspx http://www.farasaeg.ir/etabsmate_en.htm http://zaxises.com/rcbeamdetailer.htm I have personally tried none of these so can't give you any expert advise about specific softwares.
  3. 1 point

    Conceal Beam

    My friends, How to decide the width of the conceal beam . Which formula is used for it ?Secondly, How to make sure that conceal beam width is sufficient for controlling deflection in it ? Thirdly, if there is any conceal beam supporting a wall on slab. As this conceal beam will only support weight of the wall or also some portion of the slab as well as described by the area distribution method for others beams( L,T Beams) ? Friends I need your replies.
  4. 1 point

    Conceal Beam

    Some portion of slab is used by many engineers to take into the account the effect of line load on the slab. Many call it a beam, because the reinforcement arrangement resembles like a beam. But it cannot technically be called a beam; beam is a member that attracts force by virtue of its stiffness. Since, the thickness of so called beam is equal to that a slab, it cannot attract forces. It is a simplified way of taking into the account the effect of line load on slab; by arranging reinforcement in this way, one assumes that the effect of line load will be limited within the width of so called beam. So the width of the beam will be decided by the design moment. The beam will be only designed for the load of the supported wall, or the load of supported wall + the load transferred by the wall from upper levels. The so called beam cannot take any load from adjacent slab area, as it does not have the stiffness to attract any load. So tributary area thing is not applicable to that member. If you understand what is written above, you should conclude that there is no need to check the deflection. In many cases, this way of locally reinforcing the slab ( so called concealed beam) will not be able to support the load transferred from above levels, unless you increase the thickness of slab.
  5. 1 point

    Conceal Beam

    Concealed beams don't work and are non-effective. Please don't use them. Thanks.
  6. 1 point
    It should be relative deflection. For example a beam in X supporting on girders in Y direction. You need to take the net deflection of supports and mid-span (for s.s. case) to compute deflections.
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