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  • Users: dougseason
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  1. dougseason

    Seismic Design for helipad on roof top

    I am designing a rooftop helipad in a high seismic region in the USA (California). I have the gravity design loads figured out but I can't seem to find a suitable lateral system to determine the seismic coefficient. The helipad is on a rooftop and I am only responsible to design the helipad. The...
  2. dougseason

    Buckling un-braced length of uniformly loaded axial member

    Hi all, I did a search and didn't find any discussion so I'm starting this new thread. Hope I'm not creating a duplicate topic. For buckling un-braced length of a column with point load at the top, it is clear that the un-braced length equals the length of the column (assuming pin-pin top and...
  3. dougseason

    ASCE7-10 wind load on canopy at ground floor of a 40 feet tall building?

    Hi All, I did a quick search on this but can't seem to find an answer. I need to determine the design wind load (uplift pressure) for a canopy attached at 7 feet above ground floor to a 40 feet tall building. I am designing the canopy per chapter 30 of ASCE7-10 for roof overhang. Which...

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