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Confined Spaces (Construction)
National Summary

This topic covers work in confined spaces on construction worksites. Although there are currently no comprehensive federal rules for confined space work in the construction industry, there are federal rules applicable to welding, cutting, and heating in enclosed spaces.

In construction workplaces, a “confined or enclosed space” means any space having a limited means of egress that is subject to the accumulation of toxic or flammable contaminants or has an oxygen-deficient atmosphere. Confined or enclosed spaces include, but are not limited to, storage tanks, process vessels, bins, boilers, ventilation or exhaust ducts, sewers, underground utility vaults, tunnels, pipelines, and open-top spaces more than 4 feet in depth such as pits, tubs, vaults, and vessels.

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