Stop
Hello,
Rigging is a matter of finding what the load is, and then dealing with that load. You suffered through a dismasting because of materials decay, which is to say someone wasn't dealing with the load through inspection and maintenance. You suffered through another dismasting because, apparently, the mast section was too small, which is to say someone wasn't dealing with the load through basic calculations. Making wire bigger won't necessarily deal with the load, as there are several other basic considerations besides scantlings, like staying angle, relative length, distribution of load, etc. You can make your chainplates out of titanium, or lead, or shitake mushrooms for all I care, but the choice of materials should happen way down the path. If you know the load, in magnitude and nature, and if you can assign an appropriate factor of safety, then wire diameter, and most everything else, will reveal itself.
Your rig is a system; treat it like one.
Fair leads,
Brion Toss
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