Van Hise Rock was named for the preeminent geologist of the 19th century, Charles Richard VanHise, who was also president of the University of Wisconsin-Madison from 1903-1918. VanHise used this rock to show the major structural features of metamorphic* Precambrian* rock and also to demonstrate the kinds of changes that occur in rocks through mountain building periods.
The requirement for seat height, however, is very simple: The top of the seat must be a minimum of 17 inches and a maximum of 19 inches above the shower floor.
Sinks require a minimum of 20 inches of space to sit in, if they are the only sink in the room. Showers require a minimum of 30 inches of space into which a 30 inch diameter circle could be drawn. Because this is a very tight fit for most people, the recommended space for a shower is 36 inches. The ceiling in your bathroom must be at least 80 inches at the front of the sink or toilet and inside the shower. At the back of the sink or toilet, the ceiling height can be as low as 60 inches.