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Make the message clear by obstructing access to a confined space manhole.
Avert entry into a confined space manhole with Manhole Warning Barriers™.
OSHA Danger Manhole Warning Barrier™: Confined Space - Hazadous Atmosphere - Air Supply Respiration Required For Entry
This sign indicates a hazardous environment so only authorized workers should have access.
Block access with DANGER message and restrict entry by requiring permit.
Prevent entry by blocking access with confined space DANGER message.