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#4717
Anonymous
Inactive

Having thought about it some more I’m going to go with the “traditional” triple block system, then if I do get the measurements slightly wrong I just need to use a bit more / less rope rather than find my wire strops need replacing.

Next question is which sized blocks to use? Off the top of my head I’d have said 25mm but when I look around I find that the nearest thing Holt Allen do is either 20mm (which look too small) or 30mm (which look too big and chunky!). Here are links to the relevant bits:

20mm
30mm

Can anyone help with this dilemma? I’m currently leaning towards using the smaller ones with 4mm line, but will they be strong enough? It’s easy to estimate how much load I can apply to the system, but I am at a loss to estimate how much strain a strong gust might place upon it once it is tensioned and cleated…?