【一日一结】Radium Release Hitch

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▍来源：animatedknots、互联网

在攀登过程中，绳结打法的对错和速度有时关乎性命，因此熟悉各种绳结的打法与其功能是极其重要的。绳结技术的掌握来自不断的练习，体会。初时可按图依样，然后离开书练习，甚至单手打出。每一个步骤都要非常正确，毫不含糊。要做到在黑暗中或其他各种条件下能自如打结，同时也应知道如何解开结，因为在许多危险时刻，不会解开结比不会打结更糟糕。所有的绳结在完成后都需收紧才能使用，同时绳端至少预留5厘米，以免意外松脱。

Radium Release Hitch

Radium Release Hitch is a load-releasing hitch used in a two-rope technical rescue system.

Uses:

The Radium Release Hitch allows a load to be transferred from one rope to another if, for example, a Prusik Knot jams or a belay line's auto-stop engages. It is commonly rigged prior to the operation by a Search and Rescue team on the belay line anchor. The primary function of this hitch is to transfer load back to the main load line if the belay line's auto-stop becomes engaged. The resulting stoppage of the belay line can be due to a variety of causes including: main line load being lowered too quickly for the belay line operator to keep up or actual main line failure.

Preparation: The Radium Release Hitch is often prepared in advance using about 10 meters (33 feet) of 8 mm static cord. It can be stored in a pouch or bag for protection.

Advantages: The Radium Release Hitch provides a controlled load-release and can readily be tied off again if needed.

Disadvantages: The rig as typically used employs a three to one load release which uses rope quickly and limits the descent to only about three meters.

Tying

Tie a Figure 8 Loop Knot in the end and hook it into the lower carabiner. Pass a loop through the top carabiner and then through the lower one. Tie a Munter Hitch in the top carabiner. Use a bight to tie a Half Hitch and then an Overhand Knot. Untie these knots to lower the load.

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