Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 12 - CONSTRUCTION CODES SUPPLEMENT OF 2013Subtitle 12-E - MECHANICAL CODE SUPPLEMENT OF 2013
Chapter 12-E5 - EXHAUST SYSTEMS
Rule 12-E506 - COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT

D.C. Mun. Regs. tit. 12, r. 12-E506

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Current through Register Vol. 72, No. 2, January 10, 2025
Rule 12-E506 - COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT

Strike Section 506.3.11 of the International Mechanical Code in its entirety and insert new Section 506.3.11 in the Mechanical Code in its place to read as follows:

506.3.11

Grease duct enclosures. A grease duct serving a Type I hood that penetrates a ceiling, wall, floor or any concealed spaces shall be enclosed from the point of penetration to the outlet terminal. A duct shall penetrate exterior walls only at locations where unprotected openings are permitted by the Building Code. The duct enclosure shall serve a single grease duct and shall not contain other ducts, piping or wiring systems. Duct enclosures shall have a fire-resistance rating of not less than that of the assembly penetrated and not less than 1 hour. Duct enclosures shall be as prescribed by Section 506.3.11.1, 506.3.11.2 or 506.3.11.3.

Strike Section 506.3.13.3 of the International Mechanical Code in its entirety and insert new Section 506.3.13.3 in the Mechanical Code in its place to read as follows:

506.3.13.3

Termination location. Exhaust outlets shall be located not less than 10 feet (3048 mm) horizontally from parts of the same or contiguous buildings, adjacent buildings and adjacent property lines and shall be located not less than 15 feet (4572 mm) above the adjoining grade level. Exhaust outlets shall be located not less than 20 feet (6096 mm) horizontally from or not less than 5 feet (1524 mm) above doors, operable windows and air intake openings into any building.

Exceptions:

1. Exhaust outlets shall terminate not less than 5 feet (1524 mm) horizontally from parts of the same or contiguous building, an adjacent building and adjacent property line where air from the exhaust outlet discharges away from such locations.
2. On narrow lots where a 20 foot distance from doors, operable windows and air intake openings into any building cannot be achieved, the code official is authorized to approve a smaller distance.

When an approved odor and grease removal system is installed, termination is permitted in accordance with the requirements of Item 2 of Section 501.3.1 of the Mechanical Code, provided termination is not less than 15 feet (4572 mm) above the adjoining grade level.

D.C. Mun. Regs. tit. 12, r. 12-E506

Final Rulemaking published at 61 DCR 3101 (March 28, 2014 - Part 2); as corrected by Errata Notice published at 61 DCR 5246 (May 23, 2014)
The District of Columbia Mechanical Code (2013), referred to as the "Mechanical Code," consists of the 2012 edition of the International Mechanical Code, published by the International Code Council (ICC), as amended by the District of Columbia Mechanical Code Supplement (2013)(12 DCMR E). The International Mechanical Code is copyrighted by the ICC and therefore is not republished here. However, a copy of the text may be obtained at: http://publicecodes.cyberregs.com/icod/imc/2012/index.htm?bu=IC-P-2012-000005&bu2=IC-P-2012-000019.
Authority: Section 10 of the Construction Codes Approval and Amendments Act of 1986 (Act), effective March 21, 1987 (D.C. Law 6-216; D.C. Official Code § 6-1409 (2012 Repl.)) and Mayor's Order 2009-22, dated February 25, 2009, as amended.