ay the middle of the static rope over the apex of the A-Frame, leaving an 18 inch bight over the apex. This is known as the anchor bight.
^®Tie clove hitches above the lashing on each side of the apex, ensuring that the clove hitch locking bars are facing each other and are next to the lashing. The 18 inch bight is left dangling from the top of the apex.
^^Anchor the A-Frame, using a round turn and, two half hitches. Angle the A-Frame 30 degrees from the vertical and tie off using two half hitches. The rest of the rope is coiled neatly and placed out of the way.
^^Construct a second 18 inch bight from the top of the apex using a sling rope. This is known as the safety bight. Attach the sling rope to each side of the apex of the AFrame above the first clove hitches the same manner as the anchor bight with the locking bars to the outside. Adjust the spacing between the anchor bight and safety bight to 1-3 inches (2-4 fingers). Secure the pigtails of the sling rope with a square
knot and two overhands at the rear of the apex of the A-Frame.
^^Two steel locking carabiners with gates opposite and opposed are inserted into both bights hanging down from the apex.
9 Hauling Line. A hauling line is constructed next. Hauling lines can be constructed in two different ways. Either by using the end of the rope or securing it to itself making an endless rope.
or lowering and raising heavy loads and personnel; the end of the rope is used. (This method is less efficient but much safer than the endless rope) It is constructed by running one end of the rope through the carabiners/pulleys on the safety/anchor bight and tying a figure 8. The other end is then incorporated with an anchor (i.e. tree wrap) and an appropriate lowering/raising system discussed later.
^pf the hauling line is to be controlled from the bottom of the cliff, it is converted into an endless rope by tying the two ends together using a square knot finished with two overhand knots. Next, two directional figure-of-eight knots are tied on opposite sides of the rope, one at each loading/unloading platform.
^^After completing the hauling line, personnel at the base of the cliff should pull on the line to test it and the A-Frame.
d Additional Considerations
HfiEliminate excessive friction. Use pulleys when possible.
^^To help keep the line taut and the load from banging into the cliff, tie a swami wrap on a tree with a carabiner and pulley on it. Run the endless rope through the pulley and tighten the joining knot on the endless rope. This will minimize the mule team size and make it easier to move the loads up and down.
^^Remove any obstacles and any loose objects, which could be dislodged by men or equipment.
)A knotted handline may be used to aid individuals up a vertical hauling line and is constructed as follows: Overhand knots are be placed approximately 10-12 inches apart, ensuring that there is approximately 20 feet without knots at one end to be used to anchor. To anchor the handline, tie a round turn and a bowline finished with an overhand, around the anchor and throw the knotted handline over the apex of the AFrame. The knotted handline is used as a simple fixed rope by any personnel ascending the vertical hauling line.
TRANSITION: Are there any questions over the A-frame construction? We will now discuss how to gain height using a tree.
(5 Min) USING A TREE TO GAIN HEIGHT. When using a tree to gain height in a vertical hauling line installation; there are some considerations that need to be applied. The following factors are to be considered:
3! Select a branch that has not been chopped, burned or is rotten.
9 The branch must be at least 6" in diameter or of suitable thickness to support the intended load.
c. The branch should be at a sufficient height to offer adequate clearance for the load.
d A loose swammi wrap will be tied around the intended branch.
e. Two steel locking carabiners with gates opposite and opposed are inserted into the swammi wrap.
USING A TREE TO GAIN HEIGHT
f The desired rope installation will be attached through the carabiners.
TRANSITION: Are there any questions over the construction using a tree? If not, we will now learn how to operate a vertical hauling line.
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