I missed saying above that I'm sorry that you've already had issues with the raccoons.Oh, wonderful. The door is really thick, solid wood so I don't think they could shred their way through it, I'd just be worried about them opening it like they did the egg door (that we had to permanently close off). Maybe there's a way we can fashion it to lock at night?
Ideally I'll be able to keep them out of the run entirely so they won't be able to even access that door, because we lost most of our chickens during the daytime last summer when the raccoons broke in.
They are a difficult predator to deal with. They are so incredibly strong and so incredibly skilled with those hands of theirs.
Solid wood is good. If it was individual boards they can pull those off if they are really determined. If a house sits vacant for a couple of years, there have been instances where raccoons have broken through the roofs to gain access.
In our case they didn't shred the door like the mink, they broke a section of the door inwards and entered through the broken part. It was an eye-opener for us. Those doors shut tight and there is no access for their paws.