1105.5.4 Openings in Corridor Walls
Windows in corridor walls shall be sealed to limit the passage of smoke, or the window shall be automatic-closing upon detection of smoke, or the window opening shall be protected by an automatic closing device that closes upon detection of smoke.
Doors in corridor walls shall not include louvers, transfer grills or similar openings.
Exception: Doors shall be permitted to have louvers, transfer grills or similar openings at toilet rooms or bathrooms; storage rooms that do not contain storage of flammable or combustible material; and storage rooms that are not required to be separated as incidental uses.
Doors in corridor walls shall limit the transfer of smoke by complying with the following:
- Frames for side-hinged swinging doors shall have stops on the sides and top to limit transfer of smoke.
- Where provided, vision panels in doors shall be a fixed glass window assembly installed to limit the passage of smoke. Existing wired glass panels with steel frames shall be permitted to remain in place.
- Door undercuts shall not exceed 1 inch (25 mm).
- Doors shall be positive latching with devices that resist not less than 5 pounds (22.2 N). Roller latches are prohibited.
- Mail slots or similar openings shall be permitted in accordance with Section 122.214.171.124.