Upon examining the joists where I tore out the ceiling drywall in the floor I'm working on I've discovered where someone had notched out 3 joists in order to install a plastic hose leading away from a bathroom ceiling fan. The funny part is, the hose is only about 3 feet long and exits into a hole that leads to the underside of the bath tub in the floor above. Stupid! Stupid! Stupid!

I'll probably add another joist at this location. It's hard to say how long it's been this way. This house is 60 years old. I'm almost afraid to remove more drywall. Don't know what I'll find.