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Recent content by CDG31

  1. CDG31

    Exterior Equipment Concrete Pad

    I have an exterior concrete pad that is 14ft x 8ft. Frost Depth is 2ft. A 12" pad is enough to support the equipment. Can I provide a turndown only at the perimeter to account for the frost depth (2ft turndown) and keep the interior of the pad at 12"? Or do I need to thicken the entire concrete...
  2. CDG31

    Portal Frame

    How can I solve the reactions for a portal frame that has fixed bases, it's height is 14ft, its width is 10ft, and the applied nodal load is 7.75k applied at the top left corner of the portal frame? I would like to calculate the shear, axial, and moment reactions at both bases. I am confused on...
  3. CDG31

    REVIT or AutoCAD for 2D drafts?

    I don't think REVIT is a good software for shop drawings, I also think that 2D is dying out as 3D is taking its place. 3D is possible now since computers are much better. The reason I don't think REVIT is a good option for shop drawings is because it lacks detailing capability. I think a better...
  4. CDG31

    Can you find the site class from the PGA or the Mapped Acceleration Parameters?

    I got asked a question recently that just threw me off. The question was three lines long, PGA = 0.3 S1 = 0.9 (I think S1 was 0.9, but I don't recall exactly what the value was) Find PGAm? I know PGAm can be found using section 11.8.3 from ASCE 7-16 but the factor Fpga, is based on the site...
  5. CDG31

    Low Ductility of a Beam Working Primarily in Shear

    My thoughts are that you can compare it, in terms of shear, to a concrete beam without reinforcement. Concrete is a brittle material yet it has its own shear capacity and definitely needs reinforcement to help with tensile forces. I think your case is similar. I would make sure the beam has...
  6. CDG31

    Redundancy factor for shear walls

    Hi, Talking specifically about section 12.3.4.2 in ASCE7-16 "Redundacy Factor, rho for seismic design categories D through F" condition b. the last part which states "...The number of bays for a shear wall shall be calculated as the length of shear wall divided by the story height or two times...
  7. CDG31

    Can you find the site class from the PGA or the Mapped Acceleration Parameters?

    Hi, I am wondering if the site class can be identified from the PGA for a specific site or the site Mapped Acceleration Parameters Ss or S1? If so, how? Thanks,
  8. CDG31

    5ply built up Wood colum

    Thank you all for your replies. Celt83, If I may ask, what nailing pattern do you use to attach the 4ply gang post? Thanks, CDG31
  9. CDG31

    5ply built up Wood colum

    I am trying to find a nailing pattern for my 5ply 2x6 built-up wood column. According to NDS 15.3.3.1 b) all nails have to penetrate all my laminations and at least 3/4 of my outermost lamination. For my 5ply wood column the nail should have a length of at least 7.125" but the maximum size of a...
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