Fall arrest systems arrest an active fall by an employee, and consist of an anchorage, connectors, a full body harness, and may include a lanyard, deceleration device, lifeline, or combinations of these. They can be rigged to prevent free fall more than 6 feet or contact with a lower level. The criteria for use of these systems can be found in 29 CFR 1926.502 (d).
Suspension systems permit workers to be in a seated position while performing a particular job task. Chest connections should only be used for static loads while a worker is suspended, or used as a connection for ladder climbing systems, and limit free fall to 18 inches and fall arrest forces to 900 lbs or less.
Positioning Device Systems
Positioning device systems are comprised of a belt with D-rings in the hip area of the body of the user. These systems shall be rigged to allow an employee to free fall a mazimum of 2 feet and support the worker where both hands may be free to do necessary work. The criteria for positioning device systems can be found in 29 CFR 1926.502 (e).
These systems should only be used for lowering or extracting a worker to/from a working surface via the shoulder D-rings and spreader bar. This allows all pressure of the harness to be released from the employee after the surface has been reached. The system is not designed for and should never be used for personal fall arrest.