Originally Posted by sailordave
New to me sailboat. Bow and stern cleats
are backed w/ nothing but fender
But hey, they've worked for 20 years.
My plan is to replace them w/ G10 epoxied to the underside of the deck structure and then use longer bolts and fender
washers to beef things up.
Boat is 36', 13000#
My QUESTION is.... .25" or .50" G10.
My guess is .25" will be sufficient, but I want to hear from the resident "experts" on this.
I figure this is a trick question. There simply is not enough information, unless the responder has done surgery on this specific boat (some may have).
What is the existing deck lay-up? Cored or solid?
On my boat the deck varies from cored with thin skins, to thicker skins, to very thick solid lay-up, depending on the area. The cleats
were mounted in areas with NO CORE, specifically for this reason. So, without knowing, we are just guessing. But most quality manufacturers will build without core in the bow cleat
I'm guessing--so is everyone else so I might as well--that even a thin layer of reinforcement that is well bonded
to the underside will add far more strength than you realize. Anything beyond 1/4-inch would be silly and 1/8-inch is probably very suitable. By bonding the FRP it should act as a part of the laminate, not as a fender
washer, and far less is needed. Taper the edges at least 5:1 to avoid a hard spot. Use plain--not fender
washers--as they are thicker and will better transfer force to the G10. Fender washers will just dish (not enough to see) and will only apply force on the very edge of the new stiffer laminate.