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.
Quick Answer. A standard one-piece shower and tub combination unit is purchased with rough-in dimensions of 60 inches wide, 31 inches deep and 73 3/4 inches high before installation. After the unit is installed, the finished unit is still 60 inches wide, but the measurable depth is 29 3/4 inches deep and the overall visible height is 72 1/2 inches. Keep Learning.