18-29-904.1.1 Roof extension unprotected.

   Open vent pipes that extend through the roof shall be terminated not less than 12 inches (305 mm) above the roof.

(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3)

18-29-904.1.2 Occupiable rooftop.

   Where the rooftop is to be used as a promenade, restaurant, bar, sunbathing deck, observation deck or for similar purposes (occupiable rooftop), open vent pipes shall terminate not less than 7 feet (2134 mm) above the highest walking surface located within 10 feet (3048 mm) horizontally.

(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3)

18-29-904.1.3 Reserved.

(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3)

18-29-904.1.4 Sidewall vent terminal.

   Vent terminals extending through the wall shall terminate not less than 10 feet (3048 mm) from the nearest abutting lot line and 10 feet (3048 mm) above the highest adjacent grade within 10 feet (3048 mm) horizontally of the vent terminal. Vent terminals shall not terminate under the overhang of a structure with soffit vents. Sidewall vent terminals shall be protected to prevent birds and rodents from entering and blocking the vent opening.

(Added Coun. J. 10-14-21, p. 37722, Art. IX, § 3; Amend Coun. J. 12-14-22, p. 58278, Art. VI, § 18)

18-29-904.2 Frost closure.

   Every vent extension through a roof or wall shall be a minimum of 4 inches (100 mm) in diameter. Any increase in the size of the vent shall be made a minimum of 1 foot (305 mm) inside the thermal envelope of the building.

(Amend Coun. J. 10-14-21, p. 37722, Art. IX, § 3)