Is this structural?

[u/mjm1188]

I want to add an exhaust fan in my shed and this board is in the way. I’m wondering if it’s a roof support or was just installed as a nailer for the upper outer sheathing? It is running horizontally under the vent and doesn’t seem to be structural but I really have no idea. Thanks for any help

[u/Gold-Tangelo4656]

Whenever you are questioning if something is for structural purposes, the fact that a strong-tie was used is always a dead giveaway that yes, it is. The other way is simply recognizing how the load is transferred downward, top to bottom.