Originally Posted by gulfcoastsailor
May I suggest that 99% of any pleasure sailboats connection points are not strong enough to safely secure a jackline. Start from scratch no matter what your plan.
??? Though I have heard of harness failures, I an not aware of a single deck
cleat failing from jackline loads. Documentation
? This is a very common practice, so it should have happened by now, particularly if 99% are too weak. I think they are OK.
5/16" bolt will generally hold about 5000 pounds in shear, and most bow cleats
are 2x3/8". Climbing bolt hangers are rated at 5000 pounds on a single bolt.
Small boats (<30 feet may have smaller cleats
, but the impact force and actual required strength is much less for them.
I agree that dedicated anchor
points are good for a number of reasons. My favorite reason is so that they are run correctly every time (not over the wrong control line). Of course, they must be well engineered and backed.
There is an article on this in Nov Practical Sailor.