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Forum: Deck hardware: Rigging, Sails & Hoisting 07-11-2019, 21:27
Replies: 121
Views: 17,464
Posted By billknny
Re: HR shackles can explode

You are missing a point. "Wear" over ten years does NOT result in deformation of metal. Metal deforms when it is loaded past its yield strength. Period. Full stop. Loading metal to 80% of its yield...
Forum: Deck hardware: Rigging, Sails & Hoisting 07-11-2019, 21:02
Replies: 121
Views: 17,464
Posted By billknny
Re: HR shackles can explode

If it breaks it's not "correctly sized."

Just because OTHER parts haven't broken doesn't mean the spec is right....
Forum: Deck hardware: Rigging, Sails & Hoisting 07-11-2019, 20:08
Replies: 121
Views: 17,464
Posted By billknny
Re: HR shackles can explode

It sounds like your blocks and shackles are undersized for the loads they experience.

A cat of the size of yours has VERY highly loaded rigging. You might want to go up a size or two rather that...
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