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Flexible air duct for ventilation from confined spaces in the construction site.
Close-up of a person's hands in handcuffs, wearing bracelets. The focus is on the wrists and handcuffs, suggesting a theme of confinement or arrest.
Safety workplace defocused of construction worker holding confined space permit book paper prior starting job
Blower with ducting blowing air into confined space manhole of tank. Safety equipment and one of the procedure of confined space entry.
Rusty barbed wire emerges from pristine winter snow. A stark, chilling emblem of confinement, restriction, and forgotten desolate boundaries

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