In these situations, the alternative would be a personal fall protection system, most commonly in the form of roof anchors and lifelines which offer a fall restraint or fall arrest design. Lifelines are often considered a better choice as they allow continual handsfree protection along the roof, though anchors can be used as either a single unit or linked together.
These systems can be used in either fall restraint, which restricts workers from approaching an exposed edge, or fall arrest, which allows access to the edge and arrests a fall should it occur, but the work at height hierarchy states that fall restraint should always be used where possible. If fall arrest must be used, then all users should be trained in both the equipment and rescue.
Wherever personal protection is used over the collective, then all efforts should be made to ensure users are trained, qualified and competent to prevent accidents from occurring.