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  1. goodbusiness

    No dominant mode in dynamics

    @JoshPluSE this is invaluable information for me, thank you! I will have to play around with this technique and understand it more before implementing it, but this concept of lumping mass in additional BLCs is certainly not something I would have been able to discover on my own.
  2. goodbusiness

    No dominant mode in dynamics

    Hello, I'm hoping to get some help with a particular problem for some models I've encountered when using dynamic (seismic) analysis. The problem is when have I have no single mode with a particularly large mass participation in the x or z directions. I know that generally, you want to acheive...
  3. goodbusiness

    Help with Wind uplift load combination etc

    Sorry but I'm not very familiar with MWFRS and C&C because we don't use that precise a methodology in Canadian Code. I would assume since you are resolving loads to your foundation, you would use the MWFRS wind calcs because your columns would be part of your MWFRS. Personally, I would just...
  4. goodbusiness

    Help with Wind uplift load combination etc

    I believe your confusion is coming from what you are trying to find. In your example, you are trying to determine the forces acting on a sloped member. Dead load and snow load always act vertically, but you need to resolve your forces to act normal and parallel to your member being analyzed to...
  5. goodbusiness

    Help with Wind uplift load combination etc

    I am not super familiar with American codes, but Canadian is similar. You have 4 wind load combinations to check (technically 8, but 4 can be omitted due to judgement): 0.9 DL + 1.0 WL (0°, Case A) 0.9 DL + 1.0 WL (0°, Case B) 1.2 DL + 1.0 WL (180°, Case A) 1.2 DL + 1.0 WL (180°, Case B) You...

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