1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Truss help

  1. Sep 15, 2008 #1
    The space truss showin has compression and tension forces acting in the members as shown.


    Force F is 10kN, determine the three unknown forces (F1, F2 and F3).

    I know that it should be the summation of Fx, Fy and Fz, however for F1, there is no reaction force, so I don't know what to do.

    Can somebody please help?
  2. jcsd
  3. Sep 15, 2008 #2
    Attach A & B to a vertical wall.
    What force is needed directly on the wall at the level of F3 to stop the wall from being pulled over by F.
  4. Sep 15, 2008 #3
    so the x component of F1 would be supported by the wall??
  5. Sep 17, 2008 #4
    bump ?
  6. Sep 17, 2008 #5


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I'm not too good looking at 3D, but something appears wrong with your picture. There appears to be no way for the x component of the F1 force to be balanced at the joint, since the other 3 members all lie in the yz plane, unless the picture is misleading or incomplete?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Truss help
  1. Tensor help (Replies: 5)