D.C. Mun. Regs. tit. 22-B, § 3243
3243.1 Doorway, passageway, and stairwell designs shall meet the requirements of the 1996 BOCA National Building Code and applicable District laws and regulations, NFPA Standard No. 101, Section 10-1 and 10-2, and the Uniform Federal Accessibility Standards (published pursuant to the Architectural Barriers Act, 42 U.S.C. §§ 4151 - 4157).
3243.2 Each circulation route shall be kept free from any obstruction at all times.
3243.3 Each ramp, stairway, and corridor that is used by a resident shall be equipped with firmly secured handrails or banisters on each side.
3243.4 Each handrail or banister end shall return to the wall.
SOURCE: Notice of Final Rulemaking published at 49 DCR 473 (January 18, 2002).