Because of difficulties in training residential roof workers, elimination of hazards seems to be the most feasible goal. A large enough crane capacity and boom length, plus pre-assembly at ground level, can go a long way toward the elmination of fall hazards.
Residential roof installations should be viewed as opportunities for creative fall protection, particularly using the upper wall studs and cross members as a railing rather than a working surface. This can be accomplished through the use of temporary plywood floors and stepladders.
See “Introduction to Fall Protection, 4th Edition” page 339.
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