Secondary Support Lines (Half Hitches) [Level 3]
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Notes and Resources:
This method of tying off support lines is fast and looks attractive, but is only secure enough for non-critical elements of the suspension.
Aside from lifting the limb to reduce pressure, there are two other options to avoid wearing out your bight: clipping a carabiner into the bight and using that, or going through the cuff instead of going through the bight. If you run the support line back through the cuff, be cautious that sometimes as the angles of the limbs change, it may wind up pressed against the skin, and if you lift or lower while it's against the skin you can cause really nasty rope burn.
I think I have seen people securing lines (also main lines) with only a slipped half hitch, but at the very bottom of the line, i.e. against the bight. I was wondering what is your opinon about that (the 'bight' of the half hitch is itself in a half hitch to prevent unintentional release ; but this is not necessary - basically the line holds only with a slipped half hitch at the very bottom of the line). From what I understand it cannot goes away as a half hitch tightens under load (+it cannot go further down as it rests on the point where the line joins the bight) and at the same time it is very easy to release as it is a slipped one. I was wondering what are the pros and cons and what is the advantage of using other more complex methods at the bottom of a line (such as the ones with wraps you present in tie 136 etc.). Many thanks for your precious opinion !
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