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  1. EPCI-Steel

    More FIGG Engineering Failures

    Rereading the articles about the Corpus Christi Harbor Bridge, I do not see any allegations of inadequate design. Infact the reason for replacement in not clear at all. The have been a few references to redesign by the new engineer, but nothing clear.
  2. EPCI-Steel

    More FIGG Engineering Failures

    Corpus Christi Harbor Bridge https://www.constructiondive.com/news/new-engineer-announced-for-800m-harbor-bridge-replacement-in-texas/582424/ https://www.caller.com/story/news/2019/11/15/txdot-tells-harbor-bridge-contractor-suspend-design-work-project/4196735002/
  3. EPCI-Steel

    More FIGG Engineering Failures

    Houston Ship Channel Bridge https://www.worldhighways.com/wh10/news/new-designer-houston-channel-bridge https://files.engineering.com/getfile.aspx?folder=8f896275-8915-43af-91ac-e323e9a3ba13&file=COWI-report-on-Ship-Channel-Bridge_(1).pdf
  4. EPCI-Steel

    More FIGG Engineering Failures

    I do not design bridges or concrete structures. However I believe the design of concrete structures (from what interaction I have had) is codified very well here in the US. The design of large load bearing pile groups maybe less so, and a bit open to interpretation when backed by research and...
  5. EPCI-Steel

    More FIGG Engineering Failures

    I have not seen it mentioned anywhere on this board, but FIGG has been involved in two major bridge debacles here in Texas. They designed two new cable stayed ship channel bridges, one in Houston and one in Corpus Christi, each with a total construction cost just shy of 1 billion. Well the...
  6. EPCI-Steel

    Purlin to Purlin Connection Screwed Though Flanges

    So I have a situation where a C-purlin in connected interstitially between two other purlins (a beam spanning between two girders), and the method of connecting them together at the joint is shown as a single sheet metal screw top and bottom through the flanges of both members. The purlin in...
  7. EPCI-Steel

    Another Bar Joist Repair

    Is there a private message function on this forum?
  8. EPCI-Steel

    Another Bar Joist Repair

    KootK - I was trying to go less invasive than rebuilding a section of the joist, but maybe I need to consider that approach. Time to put pencil to paper once again.
  9. EPCI-Steel

    Another Bar Joist Repair

    Once20036 - I do not agree with you on this point. The Steel Joist Institute has "Technical Digest 12" on the modification of steel joists with design examples of reinforcements of typical joists and they do account for eccentricity between the CG of the original chords or webs and the composite...
  10. EPCI-Steel

    Another Bar Joist Repair

    So I have a bar joist where a contractor core drilled through the top chords, just like Kootk's post from a week ago. It's in an older office building with no readily available information on the joist in question. I had the idea that I could design a simple chord reinforcement to reinstate the...
  11. EPCI-Steel

    Hand calculations vs FEM analysis huge difference

    JM_10, Have you done your due diligence by checking the sum of reaction forces and moments in your load cases? Usually when I have engineers with very large differences between hand calcs and FEA, there is a problem with the model loadings. Is your model accounting for pretension and friction...
  12. EPCI-Steel

    Torsional Stiffeners

    I've never heard that before, I looked in AISC-13 and Blodgett because I was curious and saw nothing that eluded to that. Usually for that type of connection I provide stiffeners that extend to the bottom flange.
  13. EPCI-Steel

    Without providing rootface can we go with PJP

    mabhuBR, There is so much you are not clear on in your post. A weld with a root face dimension of zero would be a CJP weld. It is possible to make a PJP weld with a Root Opening of Zero however. I would suggest that you look in AWS D1.1 at figure 3.3, Prequalified PJP Groove Weld Details. You...
  14. EPCI-Steel

    Welding defects in structural steel welding (Overhead Crane)

    DekDee, Smart move. We had a project that was done in a Chinese shipyard with our own team of local (mistake #1) and European QC inspectors that were supposed to inspect every connection with visual and appropriate NDT. After taking delivery of the modified vessel, weld deficiencies in the...
  15. EPCI-Steel

    Welding - Determine Unit Second Moment of Area (Iu)

    If you post up a sketch of your weld geometry and loading condition, I'm sure that with all of the knowledge on this forum we can get you an applicable theory and the design codes to back it up.
  16. EPCI-Steel

    Taking the PE Exam April 13, Have Questions

    Thanks for the feedback. Although I use structural as a label because there is no construction option here, I have no delusions of being able to sit for an SE exam. Also I didn't want to be associated with those environmental types what with their giant beards and their kale..........
  17. EPCI-Steel

    Stacked Beams - Moment Connection

    Whoops, looked at the wrong W6
  18. EPCI-Steel

    Stacked Beams - Moment Connection

    Looks like a construction aid to me. Are you using the W6 to support the end of the W14 during construction? If so I would look at using a square HSS as your temporary support, because you have that little W6 loaded up to its capacity and the lateral torsional buckling (LTB) and any...
  19. EPCI-Steel

    Miami Pedestrian Bridge, Part II

    Now that is interesting. I forgot about this. I was at Texas Tech for high wind design class many years ago and they showed us how they build full scale buildings, instrumented them up with strain gauges and pitot tubes and used borrowed military aircraft to wind load them until failure. We only...
  20. EPCI-Steel

    Miami Pedestrian Bridge, Part II

    Thats a load test

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