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 includes a master rope 103 that passes over a roof 113 of a house 109 having a ridge 111, from the vicinity of the ground GL on one side of the house 109, and is installed by being extended to the vicinity of the ground GL on the other side of the house 109; a weight 105 that is configured of buckets, is connected to the master rope 103 at an end portion of the master rope 103, and is installed on the ground; and a retractable fall arrester 107 that connects a harness 139 worn by a worker 50 who works on the roof 113 to the master rope 103.