Confined space entry can expose workers to a multitude of hazards, ranging from poor air quality, fire and residual chemicals, to noise, entanglement, temperature extremes and uncontrolled energy. Standards such as OSHA 29 CFR 1910.146 and ANSI/ASSE Z117.1, Safety Requirements for Confined Spaces, aim to help employers address these hazards, with Z117.1 providing the most comprehensive guidance. The latest revision of the widely used Z117.1 consensus standard (which will be renamed Safety Requirements for Entering a Confined Space) is nearly complete and is expected to be available this summer. While the Z117 Accredited Standards Committee has made many updates during this process, Tim Fisher, ASSE's director of practices and standards, points to two changes in particular that will likely have the greatest effect on OSH practice in the field.
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