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  1. SixkHz

    Angle to HSS Moment Connection

    jeff91: I started with this approach but these members consist of 316L stainless steel with a yield strength of only 25 ksi, and designed with a 2x safety factor (ASD). Goin4SE: I also have the book you referenced, but like BAretired I couldn't find an applicable example. If you could provide a...
  2. SixkHz

    Angle to HSS Moment Connection

    That makes sense, thanks.
  3. SixkHz

    Angle to HSS Moment Connection

    BAretired: my experience with yield line theory is very limited. Assuming a plate on an HSS with an applied moment, is my approach in the attached calculation valid? http://files.engineering.com/getfile.aspx?folder=996ad1ee-902f-43f8-9d38-cab0d3733ccb&file=Yield_Line_Analysis.pdf
  4. SixkHz

    Angle to HSS Moment Connection

    Thanks for the feedback, everyone. I should have elaborated a bit more in my original post. This connection is part of a steel frame used to lift equipment (the frame connects to the equipment and a crane lifts the frame). Hundreds of these lifting frames have been manufactured already and have...
  5. SixkHz

    Angle to HSS Moment Connection

    I'm reviewing the connection for a cantilevered L3x3x0.5" angle welded to the side of an HSS6x4x0.25". There is a load at the tip of the angle resulting in a moment at the interface of the angle and wall of the HSS (see attached sketch). The angle strength is fine, and the weld is fine, but I'm...
  6. SixkHz

    Shear Breakout for Anchors according to ACI 318

    I've got a question about determining the concrete breakout for shear loading according to Appendix D of ACI 318. From the attached sketch, I have a steel column (which is part of a braced frame) anchored to a concrete T-beam below (24" beam + 8" slab). The shear load is pretty big and I'm...
  7. SixkHz

    Anchor Design: Concrete Breakout Code Comparison

    Thanks sandman21 and anchorengineer for your help.
  8. SixkHz

    Anchor Design: Concrete Breakout Code Comparison

    So is Appendix D just really conservative? I'm sure there is a better understanding of anchor failure mechanisms now than there was in the old codes. If these equations are more accurate, wouldn't any anchors designed according to the old codes be under-designed (theoretically)?
  9. SixkHz

    Anchor Design: Concrete Breakout Code Comparison

    I'm checking anchors subjected to tension for concrete breakout, according to the 2004 Canadian concrete standard CSA A23.3-04. I believe the anchor design guidelines are almost identical to those outlined in ACI 318. The question I have arose when my boss gave me his old 1984 code...
  10. SixkHz

    RISAFloor - Cantilevered Beam

    Yeah I ended up calling RISA tech support and that's what they told me too. Thanks though.
  11. SixkHz

    RISAFloor - Cantilevered Beam

    I'm trying to draw a cantilevered beam in RISAFloor off the side of a column (There's no back-span, just a small beam cantilevered off one side of the column). I get an error when I try to draw it saying that the point at the free end is unsupported...even if the end releases of the beam are...
  12. SixkHz

    Parapet Considerations for ASCE 7 Snow Load Calc

    Thanks for the input vmirat and mmillerpe. I may look into that snow load guide, as I'm starting to work on more projects in the US.
  13. SixkHz

    Parapet Considerations for ASCE 7 Snow Load Calc

    Thanks for your help, JAE.
  14. SixkHz

    Parapet Considerations for ASCE 7 Snow Load Calc

    Is there any reduction for drift loads against a high roof with a parapet? Referencing Figure 7-8 from ASCE 7-05, I have hb+hc+hp, where hp is the height of a parapet on the high roof. I'm more familiar with the Canadian National Building Code, which accounts for this parapet height in the...
  15. SixkHz

    ASCE 7-05 Gust Effect Factor

    Thanks for your help.
  16. SixkHz

    ASCE 7-05 Gust Effect Factor

    I'm a Canadian engineer-in-training and I'm working on a glass canopy design for an American project. I've used ASCE 7-05 to calculate seismic loads but this is my first time using it for wind loads. I have a couple questions regarding the Gust Effect Factor (6.5.8): 1. I've set up a...
  17. SixkHz

    Hanger Design for Lateral Seismic Loads

    Are you talking about the Design Response Spectrum, ie. determining Sa for a specific period? I attempted a dynamic analysis, but the problem is it's not site specific, so I only have a range of Sds values, and no information on the Sd1 or TL values. The TL doesn't really make a difference, but...
  18. SixkHz

    Hanger Design for Lateral Seismic Loads

    For the longest hanger, the period is 0.627s in the Global X direction, and 0.313s in Global Z. Do you have a reference or anything for how to determine seismic demand based on the period?
  19. SixkHz

    Hanger Design for Lateral Seismic Loads

    Thanks for your reply JAE, In response to you comments: 1. Your modeling suggestion would make my life easier, but I don't think I can model it that way, because it doesn't account for the eccentricity of the top plate. See my mark up of your sketch. 2. I originally had Rp = 1.5, but after a...
  20. SixkHz

    Hanger Design for Lateral Seismic Loads

    I was wondering if I could get some input on this model I’ve been having trouble with. Some background on the project (refer to attached sketch): The structure I’m analyzing is a system of stainless steel beams and hangers for “cassettes” (basically boxes made up of HSS sections that holds...

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