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Find zero force members of a truss

  1. Oct 8, 2015 #1
    I was wondering how members CL and JE are zero members? They both have forces applied to them, so why would it be zero??? The attached image is the solution.

    Attached Files:

  2. jcsd
  3. Oct 8, 2015 #2


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    Loads are applied to points C, D and J.

    Load D is supported by the triangle DGA, that is by the straight chords alone.
    The upper chord ABCDEFG is under compression, the lower GHJKLA is under tension.
    Load J is supported by the triangles JDA and JDG.
    Load C is supported by the triangles CKA, CKD and DKG.

    Members BL, CL, EJ and FH have not been mentioned so they transfer no force with this loading.
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