Vertical Safety Lines are set up as a temporary safety line. The purpose of these lines is for climbing structures and being attached whilst moving up the structure. It is important that the top attachment point is suitable for the application and rated accordingly. When taking the line off the direct vertical position,users should be aware of the possible pendulum effect should a slip or fall occur. The safety line should be used under tension between the anchor and the rope grab device so that the fall distance is limited to the operational speed of the rope grab (i.e. < 600 mm). Various versions of the rope grab are available, types that slide on the end of the rope and require manual releasing to descend and automatic openable devices that will freely travel up and down the rope.