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Statics, truss anaysis

  1. Sep 14, 2011 #1
    1. The problem statement, all variables and given/known data
    Here is a link to a picture of the problem
    http://img571.imageshack.us/img571/374/truss.jpg" [Broken]
    I have to find the forces in the members marked with an x.
    2. The attempt at a solution
    I found the support reactions, but I'm not sure if I need them. Should I try to find the lengths of the members and the angles between them next?

    truss analysis*
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Sep 14, 2011 #2


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    It is always best to find the joint reactions first. Then whether you solve for the member forces by joints or sections, you yes need the angles/lengths
  4. Aug 6, 2012 #3
    If you are still having trouble, try to solve node G using these:
    G[y]=0= -20 + EG[y]
    G[x]=0= -20 + FG + EG[x].
    Then it should be easy enough to start working your way down.
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