Aw man.
Not a loose bolt. It looks like the PVC pipe that makes up the main support struts was just glued in. That isn’t surprising, but it does make my job harder. The glue must have gotten loose after all the pressure and isn’t supporting itself anymore.
They’ve taped over the joint so I can’t separate the pieces easily and reglue. Even if I could, I don’t think I have the time to let the glue set. I’m going to take out the drill and make a hole through the pipe and then jam a screw through it.
Hopefully that will get it to stay.