One of the front seats on Phil's pontoon boat is in need of replacement. Although the upholstery seems to be in good condition the plywood frame is rotten.
This is the seat base. The fabric is about all that is keeping it from falling apart. Although coated brass staples were used to attach the vinyl fabric none of the other materials used in construction seems to have been chosen for marine application in mind.
Seat back looks OK but again it's the fabric that is hiding underlying problems. It took about 4 hours to remove the 600 staples that were used to upholster the whole seat.
The framework was made of non-marine 1/2" plywood. Marine plywood, which is the only lumber product that is still allowed to contain arsenic, is expensive, somewhat difficult to obtain, and requires breathing protection when cutting due to the arsenic in the sawdust so I'll likely use 3/4" pressure treated lumber. That will require some thought because although the frame construction style is simple enough the fit between the seat and the seat back is precise which means overall dimensions must be maintained. RMB
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