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Recent content by canwesteng

  1. canwesteng

    Masonry Wall Construction

    Ah yeah, you're right, I was just using that as a limit to keep the designs simple to avoid all the headaches, but it is allowed.
  2. canwesteng

    Bolt length for pretension in AISC 348

    AISC 348/RCSC spec gives the amount of rotation for turn of the nut based on the bolt length. Is this the length of the bolt itself or the length of connected parts between the bolt head and nut? It doesn't make sense to me that the length of bolt past the nut affects the amount of pretension...
  3. canwesteng

    Masonry Wall Construction

    I don't do much masonry granted, but I though the canadian code had a hard limit at kh/t<30
  4. canwesteng

    Vibration of WF Beam Girders Supporting Steel Joists for Banquet Hall

    Guess it depends on the spans and materials of construction. In industrial I've certainly come across structures with natural frequencies in the 1-2 Hz range. Some long slender galleries, sometimes I low tune a tower to support vibrating equipment. Having seen how these bounce with just a few...
  5. canwesteng

    Vibration of WF Beam Girders Supporting Steel Joists for Banquet Hall

    More likely 0.5 to 1 Hz, which is closer to the 6" Pham said. Dancing at 5 Hz would be pretty exhausting
  6. canwesteng

    Digital Seal and Signature

    Planning and tracking is one thing... the requirement for verifiable CPD certs is just a cash grab
  7. canwesteng

    Light pole stiffener plates

    You can avoid it with a thicker base plate.
  8. canwesteng

    What is considered Supplementary Reinforcement for anchorage design in reinforced concrete pedestal

    I've taken supplementary reinforcement in your case as being the ties, which also need to be restrained by something. So rarely is there supplementary bar in a pedestal
  9. canwesteng

    Fire-Resistance Rating of Floor Assemblies in Industrial Buildings

    Equipment or used for maintenance but never occupied by people. I normally see these not called floors. Though how they are getting away with no fire rating on the office levels is odd, especially since it is change in occupancy.
  10. canwesteng

    Fire-Resistance Rating of Floor Assemblies in Industrial Buildings

    What kind of industrial building and what kind of floors? We are generally not calling floor levels floors where they are for maintenance only. If the floors are occupied by workers they should be fire separations though, and maybe you should message the AHJ.
  11. canwesteng

    Steel Deck Cantilever

    Sometimes crippling can govern over flexural yield, not sure why that would be difference for the cantilever case vs the simply supported case.
  12. canwesteng

    Slab on grade on High Density Foam

    Not sure that it being uniform is the reason it is of little importance, but it is pretty thin (probably 50 or 100 thick) relative to the soil, so most deflection should still come from the soil, even if the soil is stiffer.
  13. canwesteng

    Concrete exposed to both chlorides and sulphates

    I'd like to hear from others. Haven't got any push back from contractors, clients or concrete plants doing this but I'll confess I just invented putting multiple classes on the drawing on my own, in lieu of some verbose requirements copy pasted from A23.1
  14. canwesteng

    Concrete exposed to both chlorides and sulphates

    I put both in the notes - since for sulphate and chlorides you won't necessarily have one be critical. I guess you could just write out the requirements otherwise
  15. canwesteng

    Concrete exposed to both chlorides and sulphates

    C-1/S-2, some requirements are additive (such as testing for sulphate resistance), others you pick the most severe requirement (concrete strength)
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