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A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [1] An example is the interior of a storage tank, occasionally entered by maintenance workers but not intended for human occupancy.
Confined space rescue is a subset of technical rescue operations that involves the rescue and recovery of victims trapped in a confined space or in a place only accessible through confined spaces, such as underground vaults, storage silos, storage tanks, or sewers. A warning label on a storage tank, indicating that it is a confined space.
The Queensland government define confined water for recreational diving purposes as "Water which offers pool-like conditions, good visibility, and water which is shallow enough so that all divers can stand up with their heads well clear of the water". [16] Other definitions do not require such shallow depth, but may have a depth restriction.
In underwater diving, open water is unrestricted water such as a sea, lake, river, or flooded quarry.It is a contradistinction to an overhead environment, where there is a physical barrier to direct vertical ascent to the surface, and to a flooded confined space where there may not be enough room to maneuver freely.
The weight of the water column above the diver causes an increase in pressure in proportion to depth, in the same way that the weight of the column of atmospheric air above the surface causes a pressure of 101.3 kPa (14.7 pounds-force per square inch) at sea level. This variation of pressure with depth will cause compressible materials and gas ...
Most confined space diving environments are under an overhead. Overhead environments include work under ships and other structures, culverts, inside industrial installations, drains, sewers, penstocks and similar installations, as well as the better known cave, cavern, and wreck diving environments. The restriction on direct ascent increases ...
Any added costs on U.S. imports from the three counties "will be shared by our customers," Barry told investors on Nov. 26, noting that "there's very little in [the] consumer electronics space ...
Confined spaces also present a work hazard. The National Institute for Occupational Safety and Health (NIOSH) defines "confined space" as having limited openings for entry and exit and unfavorable natural ventilation, and which is not intended for continuous employee occupancy.