| 摘要 |
A bracket for use in attaching a safety fall arrest system to a roof having rafters. Each rafter has an upper surface comprising a central portion extending along the length of the rafter and two edge margins on opposite sides of the central portion. The central portion defines a fastening zone into which one or more fasteners may be driven to attach the bracket to the roof. Each edge margin defines a non-fastening zone into which one or more fasteners should not be driven. Each non-fastening zone has a relatively narrow width in a direction transverse to the upper surface of the rafter. The bracket has at least one fastening hole for receiving the fastener for fixedly attaching the bracket to one of the rafters, and at least two pilot holes located on opposite sides of the fastening hole. The pilot holes are sized for receiving locating members and positioned such that the locating members can be inserted into the pilot holes without contacting the rafter when the bracket is placed on the upper surface of the rafter with the fastening hole positioned over the fastening zone of the rafter.
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