Join Date: Jan 2005
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Backing Plates on Uneven Surfaces
I've been planning this appraoch to making backing plates for all the stanchions on my old Pearson Vanguard. I have the same challenge: uneven undersides to tighten against.
I plan on temporarily putting a thin, filmy non-stick material like polyethelyne sheet against the underside of my deck where the bolts protrude. Then, I will create a strengthened with fibre epoxy slurry to the consistency of cold peanut butter, the underside of the backing plate will be coverd in plastic and coated with a 1/2 or so layer of epoxy slurry. This epoxy layered backing plate will then be attached loosely to the stanchion bolts and the epoxy will fill the low spots un the underside of the deck. I expect some oozing. Once cured, I'll remove the formed plate, trim to the outline of the backing plate and reinstall. The result should be a level and solid bolting platform against which I can tighten the nuts and washers. I can't think of any easier way to do it, but I'd love to hear of an easier approach if anyone else has a better way-I may wind up permanently epoxied to the underside of my deck.