505.4.4 Design and materials.
FC § 505.4.4
The fire emergency markings for dwelling unit entrance doors shall be of photoluminescent, retroreflective or other approved material, durable, water-resistant and securely affixed and shall use Arabic numerals and/or English alphabet letters. The fire emergency marking on multi-floor dwelling units shall be a minimum of 3 inches (76 mm) high and 1 1/2 inches (38 mm) wide with a stroke width of 1/2 inch (12.7 mm) and the fire emergency markings required by FC 505.4.2 and 505.4.3 shall be in accordance with the rules. Any approved fire emergency marking may be used provided that the same type of marking is consistently used throughout the building. Photoluminescent markings and signs shall comply with the Building Code requirements for photoluminescent exit path markings.













