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Homework Help: Principal axis about a section . HELP !

  1. Aug 27, 2010 #1
    Principal axis about a section..... HELP!!!!!!

    1. The problem statement, all variables and given/known data
    a, Calculate centroid inclination of principal axis of section
    b, Now calculate principal 2nd moment of area
    c, Cargo nets produce a moment (my) about a section (Y axis only). If max bending at point A cannot exceed 380 N/mm^2, what is max my moment that can be applied to beam?


    2. Relevant equations



    3. The attempt at a solution
    My attempt at this can be seen in the attached jpeg file.
    I am not even 100% what I have done so far is on the right track, and how to make the next step. Any help would be really appreciated

    thanks in advance
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
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