• Thank u sir for the response, so sir as shown by you that edge has to be chosen, sir but I am having different options here.

Thus sir Just make me to know that which option has to be chosen ( from the image shown) for fixed support and roller support in round cross section "simply supported beam"?

Also, for this support "where" I have to apply it either on edge/surface/vertice for fixed support and roller support?

 (Here the image shows the front view of a round simply supported beam with a fixed support on one end and roller support at another )

I really appreciate you sir, for responding to every post.