OSHA requires posting at which areas that are part of a regulated area?

• A. Only the main entrance
• B. All entrances and exits
• C. Exits only
• D. No posting is required

Answer: (B)

When a space is treated as a regulated area for asbestos, warning notices are used to alert people to the presence of a hazardous exposure and to enforce restricted access. Posting at every point where someone could enter ensures that no matter which door or route a worker uses, they’ll see the warning before stepping into the area. This consistent notice is essential for controlling who can enter and for triggering the required protective measures, such as training, PPE, and proper work procedures.

Signs typically state that asbestos is present and that only authorized personnel may enter, helping to prevent inadvertent entry by unqualified workers. If posting were limited to just one entrance, someone could enter through another, unmarked access point, undermining safety controls. Hence, all entrances and exits of the regulated area must be posted to maintain clear, uniform notice and access control.