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  1. Ntollinger

    New Column Footing at Existing Column Footing

    I'm sure this has been discussed before but I can't find the magic "keywords" to match my question...so please bear with me. Given: 1. An existing pre-engineered steel building supported by reinforced concrete pier/spread column footings. 2. New pre-engineered steel building addition to be...
  2. Ntollinger

    Steel fracture in bending

    trainguy, I like the sound of that. Now begins the flurry of activity in trying to find a copy of said Section C Part II Appendix C. Would you or anyone else know of any websites that may have this section in a downloadable form (.pdf, text file)? Ordering manuals always seems to take so...
  3. Ntollinger

    Steel fracture in bending

    letrab, Your point is well taken, the flanged member is a requirement of the manufacturer I'm working for. My above discussions are simplified descriptions of the system. In reality, the gate is a cantilevered one much like the SC3000 shown in butelja's website reference to...
  4. Ntollinger

    Steel fracture in bending

    The limiting strain value IS my question, though. Assuming E=29000 ksi, and utilizing plastic theory, Ix is negligible once I form the plastic hinge. I do get to remove some energy elastically, but it's minimal compared to the plastic amount. Zx is my controlling property. But how far...
  5. Ntollinger

    Steel fracture in bending

    Boo1, Yes, F ultimate is the "stress value" at which it will fail and/or fracture. My problem is determining that value in relationship to bending. I'm only finding such values in relation to axial tensile elongation...such as some set percentage of elongation, such as 15% to 20%...
  6. Ntollinger

    Steel fracture in bending

    I am involved in a security gate/vehicle restraint design in which I need to provide a steel wide-flange cross beam across two bollards to stop a moving vehicle (15,000 pounds traveling at 30 mph). I based my analysis on plastic theory/conservation of energy and, on paper, it performs as...
  7. Ntollinger

    Vehicle Impact Loads on Stationary Structures

    As Austim said, Thread(507,23317), may give you some ideas to consider. As the originator of that thread, I found I received excellent direction from all who responded. I did take their advice to heart (and calculator), and performed my analysis based on plastic/energy absorption. Turns out the...
  8. Ntollinger

    Design for Vehicular Impact

    I'm looking for recommendations for methods of analysis for design of an impact resistant cantilever security gate in the USA. 1. Two posts embedded in below grade concrete. 2. Steel WF section mounted across the posts and cantilevered to support a sliding gate section. 3. Vehicle impacts the...

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