FALL PREVENTION SYSTEM, MULTIPLE-RING MEMBER, 8-SHAPED RING MEMBER, FOUR-HOLE MEMBER, METHOD FOR WORKING ON ROOF, MAIN ROPE INSTALLATION METHOD, BUCKET FOR FALL PREVENTION SYSTEM, AND HOOK FOR ROOF VERGE

摘要

A fall prevention system (101) is provided with a main rope (103) installed so as to extend from near the ground surface (GL) on one side of a house (109) over the roof (113) of the house (109), the roof (113) including the ridge (111), to near the ground surface (GL) on the other side of the house (109); a weight (105) composed of a bucket, connected to an end of the main rope (103), and installed on the ground surface; and a retractor-type fall prevention device (107) for connecting to the main rope (103) a harness (139) worn by a worker (50) working on the roof (113).