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Building Regulations and Standards: RCJ load bearing calculations

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  1.  
    • CommentAuthorJonti
    • CommentTimeApr 2nd 2011
     
    does anyone know how you calculate the load bearing capacity of 100mm x 75mm x 1500mm,

    Jonti
    •  
      CommentAuthorSteamyTea
    • CommentTimeApr 2nd 2011
     
    We had a thread on this, ask Joiner as I think he started it, it did degenerate somewhat into a petrol head conversation.

    This may help though:
    http://www.engineeringtoolbox.com/beam-stress-deflection-d_1312.html
    • CommentAuthorwookey
    • CommentTimeApr 3rd 2011
     
    I do. But I don't know what an RCJ is. Something like an RSJ? Greentram's eurobeam software is nice and easy to use (and has a demo version). Runs OK under wine. But obviously you can just do the raw beam sums. Of course the raw 'at what uniform/point load will it fail' isn't all that useful for real building design (that has to get past any sort of inspector). You need to know a load of factors and assumed loads which get added up to provide various load combinations. Then design for the largest one (which in my case was exceptional snow load + maintenaince point load).
    • CommentAuthorJoiner
    • CommentTimeApr 3rd 2011
     
    •  
      CommentAuthorSteamyTea
    • CommentTimeApr 3rd 2011
     
    :bigsmile:
    • CommentAuthorJonti
    • CommentTimeApr 3rd 2011
     
    Thanks ST and joiner.

    Wookey the C in RCJ is concrete. I was wanting to know the strength of the RCJ not the situational stress though I appreciate your input,

    Jonti
  7.  
    RCJ - do you mean a concrete beam with an appropriate amount of re-bar in it?
    Here such things are cast in place and the size, amount of re-bar and position of that re-bar is determined by a structural / civil engineer
    Peter
    • CommentAuthorJonti
    • CommentTimeApr 3rd 2011
     
    Hi Peter,

    yes, re-bar inforced concrete beams:smile:

    Jonti

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