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Raceway: A channel designed expressly for holding wires, cables, or busbars, including conduit, tubing, wireways, busways, gutters, or moldings.

Rating: The stated operating limit of a piece of equipment, expressed in a unit of measure such as volts or watts.

Rated load: The manufacturer's specified maximum load to be lifted by a hoist or to be applied to a scaffold or scaffold component.

Rebuttal: Evidence introduced to counter, disprove or contradict the opposition's evidence or claim, or responsive legal argument.

Receptacle: A device, such as a jack or an outlet, to which conductors are attached, and where a plug makes contact with a source of electric current.

Reconsideration of a summary rating: A process used when you don't have an attorney and you think mistakes were made in your permanent disability rating.

Registered Professional Engineer: A person who is registered as a professional engineer in the state where the work is to be performed. However, a professional engineer, registered in any state is deemed to be a "registered professional engineer" within the meaning of this standard when approving designs for "manufactured protective systems" or "tabulated data" to be used in interstate commerce.

Regular work: Your old job, paying the same wages and benefits as paid at the time of an injury and located within a reasonable commuting distance of where you lived at the time of your injury.

Regulations: A rule, ordinance, law or device, by which conduct or performance is controlled.

Resistance: Anything that impedes the flow of electricity, particularly in direct (DC) current. Resistance is measured in ohms.

Re-shoring: The construction operation in which shoring equipment (also called reshores or re-shoring equipment) is placed, as the original forms and shores are removed, to support partially cured concrete and construction loads.

Restricted Area: A location that's within 50 meters of a live surface facility that might release hydrocarbons.

Risk Assessment Matrix: A tool used to compare assessed risk, based on the probability and consequences of a potential incident.

Risk: The possibility of injury, loss or environment incident created by a hazard. The significance of the risk is determined by the probability of an unwanted incident, and the severity of its consequences.

Rollover protective structure (ROPS): Vehicle structures such as roll-bars, frames, roll-protective cabs etc., designed to prevent the vehicle operator from being crushed as a result of a rollover.

Rope grab: A deceleration device which travels on a lifeline and automatically, by friction, engages the lifeline and locks so as to arrest the fall of an employee. A rope grab usually employs the principle of inertial locking, cam/level locking, or both.

Roof: The exterior surface on the top of a building. This does not include floors or form work which, because a building has not been completed, temporarily become the top surface of a building.

Roofing work: The hoisting, storage, application, and removal of roofing materials and equipment, including related insulation, sheet metal, and vapor barrier work, but not including the construction of the roof deck.