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A yellow triangle or notice warning of restricted entry.
Also known as: Confined space entry sign, Restricted entry sign, Permit required space, Warning sign on a tank hatch
A confined space sign marks a space that is enclosed enough for the atmosphere to become dangerous, and the definition is about the atmosphere rather than the size — a large tank is a confined space and a small cupboard is not. Most confined space deaths are of would-be rescuers.
Warns that an enclosed space presents a risk of a hazardous atmosphere and that entry is controlled.
Contexts: Public information
Depends on the risk of a dangerous atmosphere rather than on physical size: a large vessel qualifies and a small enclosed room may not.
Contexts: Public information
Marks a space entered under permit, with atmospheric testing and a rescue plan in place before entry.
Contexts: Public information
Guards against a documented pattern in which a majority of fatalities are people who entered to rescue a first casualty.
Contexts: Public information
A yellow triangle with a black exclamation mark, or a rectangular notice panel, bearing the words CONFINED SPACE and entry conditions.