Zero Force Members - Trusses

[DiamondV]

Homework Statement

Okay, I need help quick, exam in few hours, I won't be able to reply to this later.

http://puu.sh/lQeXl/42907b0a12.jpg [Broken]

In my lectures notes this is given. In the example shown with it, the one on the right in particular. Look at Joint C, it is unloaded, it also has to members connected to CG and CH both of which are non-collinear, but neither is zero force? I know technically there are 4 members connected to Joint C but I have no rule for 4 members so I just thought maybe we just ignore the other two(sounds weird) No other info about zero force members was given.

Also one more thing, Joints E and K, they are loaded due to the reaction forces correct?

Homework Equations

N/A

The Attempt at a Solution

N/A[/B]

 

[BvU]

no rule for 4 members

That simply means you can not identify a zero-force member there.

Joints E and K, they are loaded due to the reaction forces correct?

Correct

Good luck with your test !

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[DiamondV]

That simply means you can not identify a zero-force member there.
Correct

Good luck with your test !

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So I would have to do out the equilibrium calculations to find if there are any zero force members connected to a joint with 4 members.

 

[BvU]

Don't think that will help: then you still have 4 members (and a force). But I'm not an expert, so not sure.