4Accommodating people with disabilities is not only an important factor when designing buildings - it's the law. As a result, it is imperative that you have a solid grasp of the specifications of the INTERNATIONAL CODES COUNCIL'S A117.1 2009 ACCESSIBLE AND USABLE BUILDINGS AND FACILITIES standard, which is designed to make sites, facilities, buildings, and elements accessible to and usable by people with such physical disabilities as the inability to walk, reliance on walking aids, visual and hearing impairments, reaching and manipulation disabilities, lack of stamina, and extremes of physical size. This updated edition includes a new chapter on recreational facilities, a new section addressing technical requirements for variable message signs commonly used in transportation facilities, and a number of other clarifications, revisions, and additions that enhance the solid provisions set forth by its predecessors. Check out our app, DEWALT Mobile Pro�. This free app is a construction calculator with integrated reference materials and access to hundreds of additional calculations as add-ons. To learn more, visit dewalt.com/mobilepro.