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.
Standard Toilet Height. Non-ADA toilets have no formal or legal requirement for the height. Industry standard, however, for many models sold for installation in residences range from 16.5 to 18.5 inches in height with a seat width of 14 inches. A unit with a 16.5 inch height is the common practice in manufacturing and sales.