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.
1 Showers should include a bench or seat that is 17 to 19 above the floor and a minimum of 15 deep. 2  For safety reasons, a pivot shower door should open into the bathroom. 3  This way, if someone falls, you can get in to provide assistance.