Personal fall arrest systems (remember, fall restraint systems—which do not have a lanyard length requirement—prevent an operator from falling out of the platform while fall arrest systems ...

The company explains that fall restraint is the process whereby a system prevents a worker from reaching an edge. On the other hand, fall arrest stops a worker in the process of a fall.

PSG's Guardian Retractable HLL (horizontal lifeline) is for use in either fall arrest or as part of a fall restraint system, which prevents the worker from reaching the leading edge of a fall hazard.