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Thread: Compression Force on square tube

  1. #1
    Associate Engineer
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    Jul 2016
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    Compression Force on square tube

    Can someone give some pointers on how to calculate the compression force of a steel square tube 4" tall x 2" wide x 0.125" wall thickness. I would like to know how much weight can be applied before the steel tube begins to deform. However, everywhere I look, I only see numbers for tensile strength and I'm not sure if this is completely applicable here. I understand that the vertical sides will be under tension so is the tensile strength the only thing I should be concerned about? Hope my paint drawing is clear.


    4 x 2 x 0.125"
    yield strength: 71,000
    tensile: 76,000
    A36 steel
    moment of inertia: 1.51 units^4
    section modulus: 0.75 units^3

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  2. #2
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    Bold Springs, GA
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    2,122
    Have you seen the following webpage?

    Beam Stress, Deflection Analysis
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

  3. #3
    Associate Engineer
    Join Date
    Jul 2016
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    Quote Originally Posted by Kelly Bramble View Post
    Have you seen the following webpage?

    Beam Stress, Deflection Analysis
    Thanks. I did not see that.

  4. #4
    Lead Engineer
    Join Date
    Aug 2013
    Location
    Houston TX USA
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    398
    Another item to be analyzed is the contact area where which each load is being applied to determine if the top tube will be subject to localized buckling at those points.

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