Stress tools are not available while working with beam
 

Hi there,
Could any one help me?
I want to analysis an steel structure, and I need the result is Equivalent von-Mises stress.
But the stress tools are not available (please the picture)
The way I create the model is: create 2 point and make a line from them, then I assign cross section to the line, pls see the picture
Could you show me the problem here? :confused:
Thanks a lot!!
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Attachment 31074