Any space that has limited or restricted means of entry or exit is required to have a Confined Space Sign, per OSHA
. Post Confined Space Signs to inform others about areas that are not designed for continuous employ occupancy, although they're large enough for an employee to perform assigned work. Confined spaces include narrow openings in tanks, vessels, vaults, manholes, ductwork, equipment housing and pipelines, to name a few and require a Confined Space Sign. Keep others informed and safe by clearly marking all confined spaces with Confined Space Signs. Select the style, material, and size that will keep those around you safe and ensure your Confined Space Sign is compliant!