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  • Users: Ntollinger
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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

    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...
  3. 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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