Can Zero Force Members Be Ignored in Structural Analysis?

[jghlee]

Homework Statement

So when it comes to finding the zero force members, am I correct in assuming that any member previously eliminated will cease to act as a member for a point?

http://img402.imageshack.us/img402/603/47362170.th.jpg

so for example we know that IJ is a zero force member because when we view it via point, J, it's obvious that there's 2 colinear members and the third is an extra. But if we now move to point I, can I essentially delete IJ and completely ignore that it's there? so that I can get another situation where there's 2 colinear members and and the third extra (IL)?

Homework Equations

The Attempt at a Solution

 

[PhanthomJay]

Yes, you are correct, both IJ and IL are zero force members (there are others also).