Wood in any high moisture area needs a moisture bearer such as oil based paint on top, sides and bottom. Stain gives little protection especially with time. There is recycled plastic decking with 25 year warranty that needs zero paint ever. Metal frame will offer far longer life. Welding is not needed with metal brackets using drill and bolt fasteners. Securement to dry land or other types of stabilisers was not mentioned. Anchors with cable securement is one option.
Great recap!!
Would rolling epoxy all over help preserve it?
Wood in any high moisture area needs a moisture bearer such as oil based paint on top, sides and bottom. Stain gives little protection especially with time. There is recycled plastic decking with 25 year warranty that needs zero paint ever. Metal frame will offer far longer life. Welding is not needed with metal brackets using drill and bolt fasteners. Securement to dry land or other types of stabilisers was not mentioned. Anchors with cable securement is one option.