International Building Code (IBC) 703.7 2018
703.7 Marking and identification. Where there is an accessible
concealed floor, floor-ceiling or attic space, firewalls,
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
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.
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.
[IBC 2018, 703,7]