Truss roof......why so many braces?
They certainly look like &quot;wind braces&quot; which keep your truss from folding flat like dominoes when pushed.
Without seeing the erection drawings for your roof, I can say that for my truss roof there were both longitudinal and diagonal braces specified as part of the erection drawing for the trusses. Trusses have a lot of stability in the direction of the truss, and none (of themselves) across the trusses. That has to be built in.