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Mechanical properties of solid

  1. Oct 8, 2008 #1
    why are pillars and columns and railway lines 'I-shaped'? how is buckling prevented? howis the weight distributed?
  2. jcsd
  3. Oct 8, 2008 #2
    most of the strength of a beam comes from the top and bottom parts.
  4. Oct 8, 2008 #3


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    Staff: Mentor

    Stiffness is a function of moment of inertia: http://en.wikipedia.org/wiki/Moment_of_inertia

    Using the concept properly enables saving on materials (saving weight and money) while maximizing strength.
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