Here is a link to the 2010 ADA Standards for showers and bathtubs.
There is a lot of great detailed drawings and such to make planning a safe and functional shower or bathroom project.
2010 ADA Standards for Accessible Design
I believe the new guidelines and codes go into affect next year. March 15, 2012 if I'm not mistaken.
By Any Design Ltd.
Actually, they usually go into effect when the municality adopts the code.
Licensed residential and commercial plumber