Find zero force members of a truss

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SUMMARY

The discussion clarifies that members CL and JE of the truss are zero force members despite having loads applied to them. This conclusion is based on the analysis of the load distribution and the support provided by the triangles DGA, JDA, and JDG. The upper chord ABCDEFG experiences compression while the lower chord GHJKLA is under tension. Members BL, CL, EJ, and FH do not transfer any force under the given loading conditions.

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  • Understanding of truss structures and their components
  • Familiarity with static equilibrium principles
  • Knowledge of load distribution in structural analysis
  • Ability to interpret truss diagrams and load applications
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  • Learn about zero force member identification techniques
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Structural engineers, civil engineering students, and anyone involved in analyzing or designing truss systems will benefit from this discussion.

MienTommy
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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.
 

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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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