1025.2.9 "No Exit" sign.

Luminous signs shall be placed on doors along the egress path that lead to dead ends (mechanical rooms, storage closets, etc.). Such signs shall contain sans serif lettering at least 1 inch (25.4 mm) high reading "NO EXIT", with the "NO" centered above the "EXIT". The "NO" may be a larger size than the "EXIT" for clarity. The nonluminous portion of such signs shall not be green. No-exit signs shall comply with Figure S101.1(10) in Appendix S.

1025.3 Uniformity.

Placement and dimensions of markings shall be consistent and uniform throughout the same enclosure.

1025.3.1 Solid and continuous.

For the purposes of this section, solid and continuous means without gaps or interruption, except as required for the control of expansion and contraction. A series of dashes, chevrons, dots, or other similar patterns is not solid and continuous. Luminous materials shall be considered solid and continuous if they occasionally contain the following safety green (ANSI Z 535.1) symbols or text:

   1.   The word "EXIT";

   2.   Egress symbol as per NFPA 170;

   3.   Direction arrows as per NFPA 170; or

   4.   Other text or symbols as approved by the commissioner.

1025.4 Self-luminous and photoluminescent.

Luminous egress path markings shall be permitted to be made of any material, including paint, provided that an electrical charge is not required to maintain the required luminance. Such materials shall include, but not be limited to, self-luminous materials and photoluminescent materials. Materials shall comply with either of the following standards:

   1.   UL 1994.

   2.   ASTM E 2072, except that the charging source shall be 1 footcandle (11 lux) of fluorescent illumination for 60 minutes, and the minimum luminance shall be 30 millicandelas per square meter at 10 minutes and 5 millicandelas per square meter after 90 minutes.

1025.4.1 Labeling.

All approved materials shall be labeled and identified with the manufacturer's name, model number and the name of the approved agency in a minimum of 6 point type with at least one such identification on each piece of material installed. However, labeling is not required for pieces of material less than 1 foot (304.8 mm) in length that are placed in immediate proximity of an identical model that is labeled. Materials may include supplemental identifying information such as the trade name or "NYC".

1025.5 Reserved.

1025.6 General standards.

Luminous materials shall comply with the design standards of Sections 1025.6.1 and 1025.6.2.