On the far corner of our carport, I replaced an eave-mounted light a few days ago that had no junction box holding it. In trying to be a responsible DIY-er, I decided to go ahead and install a junction box for the new light fixture before mounting it.
I stupidly chose to use a reciprocating saw to try to cut a round hole for the new box. In doing so, I slashed through a joist above the eave, not once but twice. The cut went all the way through horizontally but did not actually remove any chunks of wood material. My concern is that the joist/rafter could be supporting weight that will cause the joist to bow downward, on the side of the cuts.
The two cuts appear to be about the equivalent of notching the joist ~30% of the way up. The joists are, I believe, 2x8's. House was built in the 70's.
Is this something I need to repair, and if so, what is the best way to go about repairing it?
Edit: pictures detailing the boo boo. The cut is just to the right of the new light fixture. I have already patched the eave where I cut the half circle (including the two cuts that went through to the joist) so I'm not going to undo that to take a picture, but at least you get an overview.
I'm honestly not certain that it wasn't a rafter I cut through but I can investigate more when I get time and daylight.