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Where there is an accessible concealed floor, floor-ceiling or attic space, fire walls, fire barriers, fire partitions, smoke barriers and smoke partitions or any other wall required to have protected openings or penetrations shall be effectively and permanently identified with signs or stenciling in the concealed space. Such identification shall:
  1. Be located within 15 feet (4572 mm) of the end of each wall and at intervals not exceeding 30 feet (9144 mm) measured horizontally along the wall or partition.
  2. Include lettering not less than 3 inches (76 mm) in height with a minimum 3/8-inch (9.5 mm) stroke in a contrasting color incorporating the suggested wording, "FIRE AND/OR SMOKE BARRIER—PROTECT ALL OPENINGS," or other wording.

Related Code Sections

703.5 Fire and Smoke Protection Features, Marking and Identification
in the concealed space. Such identification shall: Be located within 15 feet (4572 mm) of the end of each wall and at intervals not exceeding 30 ...
703.7 Fire and Smoke Protection Features, Marking and Identification
in the concealed space. Such identification shall: Be located within 15 feet (4572 mm) of the end of each wall and at intervals not exceeding 30 ...