Washington adopts stricter trench excavation safety requirements
(UI) - Washington state has implemented new trench excavation safety requirements aimed at reducing cave-ins and improving worker protection on construction and utility projects.
Under the updated rules, contractors must complete a written trench excavation work plan before any digging begins, OHS Online reported. The plan must identify site-specific hazards, outline health and safety procedures, and document the protective systems that will be used to stabilize trench walls, such as sloping, benching, shoring or shielding.
State regulators said the plans must be developed by a designated "competent person" trained to evaluate soil conditions, identify excavation hazards and recognize signs of potential trench failure. The completed plans must remain on site and be available for review during inspections by the Washington State Department of Labor and Industries.
According to OHS Online, the regulations also reinforce existing field safety requirements. Excavations 4 ft deep or greater must provide workers with a safe means of egress, such as ladders or ramps, located so employees do not have to travel more than 25 ft to exit a trench. In addition, excavated material, equipment and other loads must be kept at least 2 ft from trench edges to reduce the risk of collapse.
Trenching and excavation work remains one of the most hazardous activities in underground construction. State officials said the enhanced requirements are intended to improve planning, strengthen oversight and reduce the likelihood of fatal cave-ins on jobsites across Washington.
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