Anyone got the foggiest idea what the strength requirements / point-loading requirements of the various plate materials might be? And more specific and useful, whether this makes much difference for our real-real world applications where we want to spread the load out under cleats, stanchions, pulpits, blocks, and etc. ?
Over the decades I have used 1/4" alum, 3/16" SS, and similar thickness in epoxy ("G10/FR4") plate materials. Often using 3/8" for the G10.
Factory stuff often consists of an Aluminum or SS plate the same size as the item on top, even to the same outline.
So, I put a much larger plate of some kind underneath, and then the factory b/u plate when I re-bolt... (Which is what I did, using G10, for all the stanchions and pulpits last year.) I wonder how much overkill is really enough?
Case in point: while working upside down in the bow the other day, prepping for an oversize G10 plate to go under a new anchor roller, I noticed that the bow cleats are backed up by 1/4" alum. about an inch by four inches. No corrosion, and all appears solid -- this in under the cored part of the outer edge of the bow on each side. Future plan is to replace both those 8" cleats with some 10" cleats and make it a bit... stronger...
In the case of the new anchor roller, the cantilever loads are very very high, and it would seem to call for a lot of load-spreading underneath. The cleat loads are mostly in shear, though.
Your "material" thoughts??
Thanks so much.
Loren in PDX
Over the decades I have used 1/4" alum, 3/16" SS, and similar thickness in epoxy ("G10/FR4") plate materials. Often using 3/8" for the G10.
Factory stuff often consists of an Aluminum or SS plate the same size as the item on top, even to the same outline.
So, I put a much larger plate of some kind underneath, and then the factory b/u plate when I re-bolt... (Which is what I did, using G10, for all the stanchions and pulpits last year.) I wonder how much overkill is really enough?
Case in point: while working upside down in the bow the other day, prepping for an oversize G10 plate to go under a new anchor roller, I noticed that the bow cleats are backed up by 1/4" alum. about an inch by four inches. No corrosion, and all appears solid -- this in under the cored part of the outer edge of the bow on each side. Future plan is to replace both those 8" cleats with some 10" cleats and make it a bit... stronger...
In the case of the new anchor roller, the cantilever loads are very very high, and it would seem to call for a lot of load-spreading underneath. The cleat loads are mostly in shear, though.
Your "material" thoughts??
Thanks so much.
Loren in PDX