Dwelling units shall have a bathroom with a sink, a shower, and a toilet on the entry level. Outlets shall be within accessible range of an adult sitting in a wheelchair. Slip resistant floors shall be used. Continuous wall reinforcement at toilet and bathroom fixtures shall be included to enable easy retrofitting with grab bar(s). All wall reinforcement shall be capable of resisting shear and bending forces of a minimum of 250 pounds. Controls on sinks, tubs, showers, and toilets shall be easily accessible or usable by persons with disabilities. 2×6 lumber blocking centered 34" off of the finished floor to include the entire perimeter of the bathroom shall be used.