Decking trailer with marine plywood

I have a 20' tagalong trailer that we haul a little of everything on. Frequently sharp objects break the 2'' deck boards. This winter it's going to get blasted,painted and redecked. Has anyone ever successfully used 2 layers of 3/4 inch marine plywood? I can get some below market price and thought about staggering the joints and glueing it together before bolting it down.All we get localy is yellow pine and it is sure brittle.
 

I covered a small utility trailer with 1/2" treated (not marine) plywood...maybe 15 years back. I used two layers with glue and staggered the joints/seams. The problem I had was with the glue holding to the treated plywood. The trailer sits outside and the plywood is still in reasonable shape.

I can't say how two layers of 3/4" plywood compares to 2'x6" or 2"x8" for strenght. I would suggest doing the home work and using the correct glue for the plywood type.
 
since you said "winter" I assume you may want to walk on it with snow / ice/ wet mud etc ?? Seems like it would be awful slippery to me.
 
How about some full 2 inch home sawed oak? Much tougher than either you mentioned, and being rough, not so slippery.
 
Individual deck boards allow rain water to run through. It will pool on plywood and no matter how tightly you glue and screw it, or how much preservative you slather on it, the water will still soak in and ruin the plywood. It will find the tiniest gap, freeze, open the crack up, let more water in, freeze some more, and so on.
 

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