Do you know why public toilet doors don't touch the ground?

Emergency Access: If someone loses consciousness in a fully enclosed bathroom, it may take hours for someone to notice. If this happens in a stall with a gap at the bottom, the odds are good someone will notice much quicker, which is important in instances where every second can mean the difference between life and death. Instead of having to break down the door, a first responder can crawl through the gap at the bottom of the partition and unlock the door to render help.