The standard applies to any space that meets the following three criteria:
- Is large enough for a worker to enter
- Has limited or restricted means of entry or exit
- Is not designed for continuous occupancy
According to the fact sheet, the vast majority of the standard’s requirements only apply to permit-required confined spaces. Attics, basements, and crawl spaces in a residential home will not typically trigger these requirements.
A permit-required confined space means a confined space that has one or more of the following characteristics:
- Contains or has the potential to contain a hazardous atmosphere
- Contains a material that has the potential for engulfing an entrant
- Has an internal configuration such that an entrant could be trapped or asphyxiated by inwardly converging walls or by a floor which slopes downward and tapers to a smaller cross-section
- Contains any other recognized serious safety or health hazard
- Download the new fact sheet (pdf).
- Read a related FAQ.
- Review the Confined Spaces in Construction Standard (29 CFR 1926 Subpart AA).
- Browse confined space signs and construction safety signs at ComplianceSigns.com.