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  1. eng.chix

    The effect of Dead Load on Base Shear

    @bones206 Understood. So that leads me to my next question: For foundation supported systems such as infill walls and exterior walls who's support conditions are essentially pinned/fixed at the base and then roller/pinned at the top, do you need to include the weight of these systems in your...
  2. eng.chix

    The effect of Dead Load on Base Shear

    The interpretations I’ve assumed for seismic design is that ALL structural weight is to be considered for seismic design, namely Base shear. What I struggle to grasp is the effect gravity loads that are being supported on the foundation only (ie. Masonry walls spanning from u/s of 2nd floor to...
  3. eng.chix

    SAFE 21 Modelling Help!

    First project in SAFE 21 since its newest release. I'm already having problems with items that used to be super simple. I'm trying to model a portion of the slab that has a vertical offset of 1500mm from the main slab. The main slab has balconies cantilevered off it with the offset slab...
  4. eng.chix

    ETABS Modelling help

    I sorted it! The issue was openings within none slab properties. If I draw around the openings such that there is no opening within the slab property, the warning disappears. So my theory is that it tries to apply the area load to the opening surface as well, but doesn't have anything to apply...
  5. eng.chix

    ETABS Modelling help

    I'm modelling a 6 Storey concrete structure in ETABS. Since the loading requirements are fairly unbalanced and variable, I've introduced numerous 'none' slab properties to apply these variable loads. It appears as though these none properties have caused issued with the model run as I get error...
  6. eng.chix

    ETABS modelling Help!

    Thank you so much for all your help @JoshPlumSE! The model works well now. The only issue I see now though is that, if I design with proprietary joists/deck, and enter the exact information into ETABS for deck and joist properties, I'm still seeing high deflections (approx 90mm), which doesn't...
  7. eng.chix

    ETABS modelling Help!

    Thank you! That did clear up my instabilities. I'm dancing the happy dance now! Going back to the steel deck question, is there a way to manipulate the steel deck properties such that they don't show stud rails?
  8. eng.chix

    ETABS modelling Help!

    Thank you @JoshPlumSE ! That is most helpful! I've added braces to my model now, as well as checked that I have the moment frame beam type corrected. My model is still showing as unstable. My next thought is that it might be coming from my diaphragm or steel deck definition. I've set the...
  9. eng.chix

    ETABS modelling Help!

    I have a 2 storey steel office building in a high seismic zone. I’d like to model it in ETABS to analyze for the seismic loads. I’m running into issues with the model after applying gravity loads only. The basis of the structure is as such: - fairly rectilinear - HSS columns (potential to...

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