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RAM | STAAD Forum Snow Load Bug in V17
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    • gravity loads
    • columns
    • foundations
    • Ram Concrete
    • Snow

    Snow Load Bug in V17

    Eric Feuge-Miller
    Offline Eric Feuge-Miller over 2 years ago

    https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/190920/is-this-defect-still-active-in-v17-of-ram-ss/564133#564133

    Does this issue impact the functionality of the design modules in RAM Concrete?

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    • Seth Guthrie
      Seth Guthrie Tue, Sep 7 2021 2:16 PM +2 verified
      The wiki confirms that the design modules would also be affected: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/33000/incorrect-snow-drift-loads-on-two-way-decks…
    • Seth Guthrie
      Seth Guthrie Tue, Sep 7 2021 2:45 PM in reply to Seth Guthrie +2 verified
      The analysis in Ram Frame when the diaphragm is meshed ( 2-way or semi-rigid ) and the snow is drifted also has a problem (average loads seem to be get applied). Internally this is our issue number for…
    • Eric Feuge-Miller
      Offline Eric Feuge-Miller Wed, Sep 8 2021 12:27 PM in reply to Eric Feuge-Miller +1 verified
      The best workarounds for this would be to change the snow loads into Roof Live Loads where they exceed the standard design Roof Live Load requirements or to create a simple excel an apply a series of averaged…
    • Seth Guthrie
      +1 Seth Guthrie Tue, Sep 7 2021 2:16 PM

      The wiki confirms that the design modules would also be affected: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/33000/incorrect-snow-drift-loads-on-two-way-decks-in-ram-concrete 



      Answer Verified By: Eric Feuge-Miller 

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    • Eric Feuge-Miller
      0 Offline Eric Feuge-Miller Tue, Sep 7 2021 2:20 PM in reply to Seth Guthrie

      Given this, would it be suggested to convert the gravity columns into lateral, releasing their end constraints to mimic gravity members, and using the member loadings in an external column design software to verify column designs?

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    • Seth Guthrie
      0 Seth Guthrie Tue, Sep 7 2021 2:22 PM in reply to Eric Feuge-Miller

      Yes, you can either simplify the snow loads as flat, or use forces from Ram Frame for Concrete Column design as reasonable work-arounds. 



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    • Eric Feuge-Miller
      0 Offline Eric Feuge-Miller Tue, Sep 7 2021 2:31 PM in reply to Seth Guthrie

      Perfect! I figured that was the case, just wanted to make sure everything was chronicled on here for others. Thanks a lot for the help Seth!

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    • Seth Guthrie
      0 Seth Guthrie Tue, Sep 7 2021 2:35 PM in reply to Eric Feuge-Miller

      I'll run a test to be sure.  I see a second defect logged that makes me think it's also broken in Ram Frame if the diaphragm is meshed. 



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