| abstract
| - Roll Over Protection Structure (ROPS) refers to operator compartment structures (usually cabs or frames) intended to protect equipment operators from injuries caused by vehicle overturning or rolling over. Right|thumb| ROPS bar on a Ford Tractor Commonly found on mobile plant & equipment]] (i.e. tractors) used in construction and agriculture, ROPS structures are defined by various regulatory agencies, including the UK Health and Safety executive (HSE). The regulations include both a strength requirement as well as an energy absorption requirement of the structure. Some dump trucks add a protrusion to their dump bodies that cover the operators compartment for ROPS purposes. In the UK, ROPS designs have to be certified by Laboratory testing , which will normally require a destructive test to be undertaken. The structure will be tested at a reduced temperature (where the metal is more brittle), or fabricated from materials that have satisfactory low temperature performance. The HSE (UK) believes that ROPS and proper seatbelt use on tractors can eliminate nearly all fatalities caused by tractor and lawn mower overturns. (Without a seatbelt, the driver may be thrown from the tractor during the overturn, and thus left unprotected by the ROPS). Some tractor operators have raised concerns about using ROPS in low-clearance environments, such as in orchards and buildings. In response, NIOSH (in The USA) developed an Automatically Deploying Rollover Protective Structure (AutoROPS) which stays in a lowered position until a rollover condition is determined, at which time it deploys to a fully extended and locked position. It is currently working with manufacturers to streamline the commercialization of this technology.
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