1020.3 O bstruction.

The minimum width or required capacity of corridors shall be unobstructed.

   Exception: Encroachments complying with Section 1005.7.

1020.4 Dead ends.

Where more than one exit or exit access doorway is required, the exit access shall be arranged such that there are no dead ends in corridors more than 20 feet (6096 mm) in length.

   Exceptions:

      1.   In occupancies in Group I-3 of Condition 2, 3 or 4, the dead end in a corridor shall not exceed 50 feet (15 240 mm).

      2.   In occupancies in Groups B, E, F, I-1, M, R-1, S and U, where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, the length of the dead-end corridors shall not exceed 50 feet (15 240 mm).

      3.   Dead-end length not exceeding 2.5 times the least width of the dead-end corridor.

      4.   In occupancies in Group R-2, the dead end in a corridor shall not exceed 40 feet (12 192 mm). However, where the corridors are completely enclosed in construction having a 2-hour fire-resistance rating with all doors opening into the corridor being self-closing and having a fire-resistance rating of 1 1/2 hours, the length of dead-end corridor shall not exceed 80 feet (24 384 mm).

1020.5 Air movement in corridors.

Use of corridors as part of direct supply, return, or exhaust air system shall be subject to the limitations of the New York City Mechanical Code.