Excellent points. OK so the grating is solid on the top with mesh on the sides for ventilation. It was just a half baked idea, and now that I think about it dr

Excellent points. OK so the grating is solid on the top with mesh on the sides for ventilation. It was just a half baked idea, and now that I think about it drainage would be a pretty big problem as well. If the drains got clogged it could turn into a death trap pretty fast in a heavy downpour.