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  1. toluun

    Lateral and Torsion Bracing

    Hello All, I am getting a little confused by the bracing required during steel girder erection and was hoping for some clarification. I know that during steel erection LTB can become a problem because the concrete deck has yet to be installed. I know that this restraint can be provided either...
  2. toluun

    Unreinforced Plug Pile

    I am working on a soil retaining system consisting of structural drilled shafts spaced 1 Dia apart and plug piles in between each structural pile. The plan is for the plug piles to be shorter (just below scour depth) and unreinforced. I have seen this done in several states and is typically...
  3. toluun

    AREMA Rocking Effect(RE)

    I am at a complete lost as to how the AREMA rocking effect is calculated. Some texts suggest that RE is calculated as the Total Bridge System while others suggest it is calculated for each Girder. My method for understanding RE is taken from the text "Design of Modern Steel Railway Bridges"...
  4. toluun

    AISC Appedix 3

    Hey guys Thanks so much for your help! I was hoping you guys could help me with another aspect of fatigue....the fatigue categories specified by AISC. I trying to find the detail shown by the attached picture I guess I am torn between category D and E. This is mainly because I am not...
  5. toluun

    Beam-to-Column Moment Connection

    I just had quick question regarding cope holes at the beam CJP Welds. Mainly I was just wondering if these cope holes are only required in order to give the welder sufficient access to deposit sound welds across the width of the flange. Or are they provided for other reasons? Thanks
  6. toluun

    AISC Appedix 3

    I had a question about equation A-3-1 in AISC Appendix 3. The formula uses a value of nSR, which is defined as number of stress range fluctuations in design life. Is this the total number of cycles that occur on the bridge over all stress ranges and its design life? Or is it the number of...

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