Page 241 - Bài 1 ok_Neat
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PRE-TENSIONED FRONT TIE
               A pre-tensioned front tie is employed
               when anchor points have been
               extended a significant distance to a
               focal point, where substantial slack
               can be generated when the anchor
               system is not tensioned.  To “pre-
               tension” and remove the slack from
               the system, a front tie is constructed

               that is simply strong enough to apply
               tension to the focal point.  This is not
               a life safety load and a much weaker
               anchor point and smaller cordage
               can accomplish this task if required.
               The front tie tends to pull the focal
               point down into the dirt at ground
               level, which is a poor location to
               manage a rescue load.  Placing an
               object, such a pack, under the focal
               point allows it to float and creates a
               much better working environment for
               rescuers (Figures 117 and 118).








                                                         Figure 116- Pre-tensioned front tie with a floating focal
                                                         point.
















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