3206.7.4 Marking on Fire Department Access Doors
FIRE DEPARTMENT ACCESS DOOR
DO NOT BLOCK
The lettering shall be in a contrasting color to the background. Letters shall have a minimum height of 2 inches (51 mm) with a minimum stroke of 3/8 inch (10 mm).
The required fire department access doors shall be distributed such that the lineal distance between adjacent fire department access doors does not exceed 125 feet (38 100 mm) measured center to center.