According to both the international building code and the international fire code floor level exit signs are required in buildings with group r 1 occupancy.
Floor proximity exit signs.
2 exterior emergency lighting.
1 illuminated emergency exit marking and locating signs sources of general cabin illumination interior lighting in emergency exit areas and floor proximity escape path marking.
Accessible exits at the level.
Floor proximity exit signs shall be located with the bottom of the sign six to 18 inches above the floor.
Floor proximity exit signs shall have the same illumination requirements as traditional exit signs.
In various circumstances an exit sign posted above an emergency exit door is sufficient but there are certain situations where floor proximity exit signs are also required.
B emergency exit signs.