Boat building, one of the oldest branches of engineering, is concerned with constructing the .. They may be made of wood, plywood, steel, aluminium or composite materials. They may be . used in powerboats. Innerliner: The cockpit or deck mold of the inside or top of a GRP boat, fitted inside and joined to the (outside) hull.
I want to use 1/4 proper marine ply as backing plates to spread the load, . which are presently bolted simply through the ply deck with largish (not very large, though) washers underneath. . (small boat 24 ft OA, not a biggy :)