D.C. Mun. Regs. tit. 11 § C1503

Current through Register Vol. 70, No. 17, April 26, 2024

Rule 11-C1503 - ENCLOSING WALLS

1503.1

All penthouses and mechanical equipment shall be in one (1) enclosure, except that the following may be contained within a separate enclosure:

(a) Penthouse and mechanical equipment located on the roof of a public school, public recreation center, or public library; or

(b) A rooftop egress stairwell or elevator enclosure not containing any other form of habitable or mechanical space that harmonizes with the main penthouse in architectural character, material, and color.

1503.2

When roof levels vary by one (1) floor or more or when separate elevator cores are required, there may be one (1) enclosure for each elevator core at each roof level.

1503.3

When consisting solely of mechanical equipment, the equipment shall be enclosed fully as prescribed in Subtitle C §§ 1503.1 and 1503.2 except that louvers may be provided. A roof over a cooling tower need not be provided when the tower is located at or totally below the top of enclosing walls.

1503.4 Walls enclosing a penthouse or rooftop structure, including screening around uncovered mechanical equipment, shall comply with the following height requirements, as measured from the roof upon which the penthouse or rooftop structure sits and shall be provided as follows:

(a) Walls enclosing penthouse habitable space shall be of a single, uniform height;

(b) Walls enclosing penthouse mechanical space shall be of a single, uniform height; except that walls enclosing an elevator override may be of a different single, uniform height;

(c) Required screening around uncovered mechanical equipment shall be of a single uniform height; and

(d) Walls enclosing a stairwell penthouse need not be of a single, uniform height.

D.C. Mun. Regs. Tit. 11, § C1503

Final Rulemaking published at 63 DCR 2447 (9/6/2016); amended by Final Rulemaking published at 65 DCR 5174 (5/11/2018); amended by Final Rulemaking published at 68 DCR 13834 (12/24/2021)