§ 150.055 OPENING IN FIRE OR PARTY WALLS.
   Openings in party or fire walls shall be provided with self-closing fire doors or with positive means of closing the openings to prevent the passage of fire. Doors in fireproof stair and elevator shaft enclosures and coverings for hatchways in floors of all buildings shall be self-closing.
('72 Code, § 151.036) Penalty, see § 10.99