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.
If you want a seat or ledge, add the seat depth to the overall shower size. I've never seen 5x5' or 6x4' showers, at least in any sub-$2mil house. Like Bookmark March 30, 2011 at 1:13AM. Thank you for reporting this comment.