| 摘要 |
Fall protection devices that can be attached with one hand to pre-existing structural members while working at elevated levels are described. Such devices comprise a generally U-shaped member having a long and a short leg, a spring-loaded plunger mechanism which serves to lock a movable retainer bar in a position to securely engage a pre-existing structural member, and an attachment point for a lanyard or other fall prevention device A positive locking mechanism for the spring loaded plunger is also described.
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