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You could still use a wood bed but use a wood like teak or ipe both are very hard and hold up out side the best . If you are better with working with steel you could use flat sheets of steel and weld it to the sides http://www.advantagelumber.com/mobile/decking2.htm
Ipa is very hard to work, and teak is about 20.00 bf right now. I have 2 flatbeds that I built from steel, but are decked with 2 layers of 3/4" pressure treated plywood. It's made for below or at grade construction. Not sure if marine plywood is available in treated. It is normally made from high grade veneers, with no voids, and a marine grade glue. I vote for the pressure treated plywood from your local lumberyard, and way cheaper. Both trucks stay outside in the Pacific Northwest horrible weather. My .02
I'm leaning towards throwing in a sheet of 3/4" treated plywood.
Originally Posted by GB SISSON
Ipa is very hard to work, and teak is about 20.00 bf right now. I have 2 flatbeds that I built from steel, but are decked with 2 layers of 3/4" pressure treated plywood. It's made for below or at grade construction. Not sure if marine plywood is available in treated. It is normally made from high grade veneers, with no voids, and a marine grade glue. I vote for the pressure treated plywood from your local lumberyard, and way cheaper. Both trucks stay outside in the Pacific Northwest horrible weather. My .02
I have not done mine yet, but I am considering using composite deck wood. I think there are some issues with shrinkage and contraction, but maybe some other members have more info on this.
I was thinking about 2x6 T&G pressure treated but my brother tells me the pressure treated is very corrosive and I'm sure no matter what you paint the steel parts with that contact the wood the paint will rub off.
When I first got my truck the bed wood was just about gone. I ripped some 5/8" CDX and installed it using the original metal bed strips which were still usable, though much rusted. I applied linseed oil thinned with mineral spirits to the ripped plywood before assembly. Over the years, whenever I washed it, I would recoat my plywood bed wood with fresh coats of oil. I cut and hauled firewood for several years, then moved to the northeast from California where I used it as a daily driver and work truck for about ten years. In all that time, it was never garaged or treated gently. Only recently have I started to restore the truck. When I removed that plywood bed wood, I found that it was still in very good condition...it could easily have lasted another ten years. Caveat: I did this plywood bed over thirty years ago. The CDX plywood available at that time was Douglas Fir and was a much better material than the CDX that one would commonly find nowadays. And, except for rabbetting shallow channels in the wood for the bed strips, the labor was about the same as if I'd used solid wood. This is all a long-winded way of saying that I've used plywood with great success
Pressure treated lumber and plywood is extremly corrosive to anything ecxept stainless steel . I would suggest white oak boards and just paint them like the factory did . I know the originals were pine but depending on where you live and how handy you are with a table saw the oak may be better value .
The sheet of plywood is usually the cheapest, and easiest method of most truck guys who use their trucks, or a plate of steel . Have seen both.
On the 53 my wife used for mulch we installed plastic sheeting 4 x 6 in the bed and along the sides and even over the tailgate. They clean up nice with a hose, and you can even lay them against the rear window area to keep mulch,etc from touching the cab....cheap but effective
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