Stove Pipe Question

[Huckleberry]

I'm in the middle of installing a new chimney-pipe set-up.
I'll end up with about four feet of SS triple-wall
sticking out of the roof, plus the chimney cap.
Should I brace it?

 

[begreen]

A brace should be attached at the 5' point if the chimney extends 5' or more above the roof.