Question

which of the following is a violation of the exit route marking requirements?

the exit sign lettering is six inches high and 3/4 of an inch thick

the exit sign is illuminated

there is an unmarked door in the exit route hallway

there is a door in the exit hallway marked \closet\

Explanation:

Analyze OSHA exit route marking standards

Under OSHA standard 29 CFR 1910.37(b), each exit route must be clearly visible and marked by a sign reading "Exit." Additionally, any door, passage, or stairway along an exit route that is not an exit, but could be mistaken for one, must be identified with a sign indicating its actual character (e.g., "Not an Exit", "Closet", "Storeroom") or a sign indicating its use.

Evaluate the given options against standards

• The Exit sign lettering is six inches high and 3/4 of an inch thick: This is compliant (OSHA requires "Exit" signs to have letters at least 6 inches high and principal strokes at least 3/4 of an inch wide).
• The Exit sign is illuminated: This is compliant (OSHA requires exit signs to be illuminated to a surface value of at least five foot-candles).
• There is an unmarked door in the exit route hallway: This is a violation. Any door that is not an exit but is located along an exit route must be clearly marked to prevent confusion during an evacuation.
• There is a door in the exit hallway marked "CLOSET": This is compliant because marking the non-exit door prevents it from being mistaken for an exit.

Answer:

• (A) The Exit sign lettering is six inches high and 3/4 of an inch thick
• (B) The Exit sign is illuminated
• (C) There is an unmarked door in the exit route hallway (Correct answer)
• (D) There is a door in the exit hallway marked "CLOSET"