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T-beams and Second moment of area

  1. Aug 24, 2006 #1
    Greetings all,

    Given an upright T-beam (really a T when you look at it) with all dimensions given, what is the procedure for finding the second moment of are about the z axis (I sub z)?

    Thank you so much.
     
  2. jcsd
  3. Aug 24, 2006 #2

    FredGarvin

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    Science Advisor

    Since this is boarderline a homeowork question, I'll try to help without helping too much.

    Do you know how to find the area moment of inertia for a rectangle about an axis (hint: you have two of them in your problem)? Do you know what the parallel axis theorem is?
     
  4. Aug 24, 2006 #3
    Yes I do know how to find the second moment of area rectangles. But I am not sure of the parallel axis theorem.
     
  5. Aug 24, 2006 #4

    Pyrrhus

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    Homework Helper

    The Parallel axis theorem or Steiner's theorem is on any Vectorial Mechanics: Static book.

    http://en.wikipedia.org/wiki/Parallel_Axis_Theorem" [Broken]
     
    Last edited by a moderator: May 2, 2017
  6. Aug 29, 2006 #5
    Thank you

    Thank you all that responded. I understand fully now.

     
    Last edited by a moderator: May 2, 2017
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