HIMore than one rope may be fed through the double crab.
NOTE: The double carabiner brake/double crab is a one way brake used for lowering only and cannot be reversed under a load.
TRANSITION: Now that we have covered the operation, are there any questions? If there are none for me, then I have some for you.
a. Students will construct an A-frame and vertical hauling line and operate a vertical hauling line.
PROVIDE HELP (CONC)
a. The instructors will assist the students when necessary. OPPORTUNITY FOR QUESTIONS (3 Min)
1 QUESTIONS FROM THE CLASS 1 QUESTIONS TO THE CLASS
What is the purpose of a vertical hauling line?
A. The purpose of a vertical hauling line is to move equipment and troops over steep, rocky terrain.
Q What are the four criteria for site-selection for a vertical hauling line?
Q(1) Suitable to anchor.
(2) Good loading and unloading platform.
(3) Sufficient clearance for the load.
(4) Butt ends of the A-Frame must be anchored.
SUMMARY (2 Min)
a During this period of instruction we have discussed the materials needed to construct a vertical hauling line with an A-frame and the actual techniques involved in the construction of an A-frame and a vertical hauling line.
3 Those of you with IRF's please fill them out at this time and turn them in to the instructor. We will now take a short break.
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