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Statics Truss Problem, Stuck at force in one member. Please help

  1. Jul 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Figured it would be easier if I showed a picture

    http://img210.imageshack.us/img210/707/problemcz.jpg [Broken]


    2. Relevant equations
    Ʃm=0
    Ʃfx=0
    Ʃfy=0

    3. The attempt at a solution

    Here is my attempted solution, I am missing member BD and not sure which way to solve it, I tried sectioning it again and it provides too many unknowns. I tried taking a FBD at joint B and D but again too many unknowns.
    Any suggestions on which way to go?
    Thanks!
    http://img804.imageshack.us/img804/12/photo2sw.jpg [Broken]
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Jul 14, 2012 #2

    PhanthomJay

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    Gold Member

    After solving for reactions and determining angles you should cut a section thru BD and sum moments about the left support. You may have done this but I can't read your calcs from this I phone tiny screen.
     
  4. Jul 16, 2012 #3
    If you solve the joints in order ABCDE, then, in each case, there are just two unknowns to solve for. This is the method of joints which is a subset of the method of sections in which no moment equations are used.
     
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