![]() ![]() OSHA uses the term "permit-required confined space" (permit space) to describe a confined space that has one or more of the following characteristics: contains or has the potential to contain a hazardous atmosphere contains material that has the potential to engulf an entrant has walls that converge inward or floors that slope downward and taper into a smaller area which could trap or asphyxiate an entrant or contains any other recognized safety or health hazard, such as unguarded machinery, exposed live wires, or heat stress. Confined spaces include, but are not limited to, tanks, vessels, silos, storage bins, hoppers, vaults, pits, manholes, tunnels, equipment housings, ductwork, pipelines, etc. While Hunter’s Lab was adopted as the de facto model for plotting absolute color coordinates and differences between colors, it was never formally accepted as an international standard. A confined space also has limited or restricted means for entry or exit and is not designed for continuous occupancy. In the 1940’s, Richard Hunter introduced a tri-stimulus model, Lab, which is scaled to achieve near uniform spacing of perceived color differences. Many workplaces contain areas that are considered "confined spaces" because while they are not necessarily designed for people, they are large enough for workers to enter and perform certain jobs. A guardrail would also be necessary to protect workers from potential falls. Press the keyboard key, or combination of keys, you want to assign as shortcut. Select the command or tool name in the list. Search for the command or tool you want to configure the shortcut for in the appropriate folder, or by using the Search field at the top of the window. Ventilation hoses provide air and exhaust toxic vapors during confined space entry. To configure a shortcut: Choose File Configure Shortcuts. ![]()
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