Accessibility standards in the US have been around for nearly 60 years. The enforcement of the standards over that time has resulted in a much more accommodating non-residential built environment. Still, the standards are too often functional minimums and orient us towards special, "Design for Disabilities", rather than normative, integrated design for everyone for the lifespan. Nevertheless, you need to know about them and the links below will connect you to the ADA standards and two most relevant national accessibility standards (the 2009 and 2017 ICC standards). As a bonus, there is a link to an accessibility guide to restrooms, which includes some universal suggestions too. Finally, we have a link to a comprehensive universal design implementation strategy, Innovative Solutions for Universal Design. (isUD).