Bed wood question

[davee60]

Hi All,

I'm trying to decide between a couple options for new bed wood in my 1966 K10 Suburban. The body will be off the frame, so using a one-piece plywood floor would not be an issue, I assume. I'd go with marine grade plywood, and seal or treat the underside really well. Then, route some channels in the top to accept the metal bed wood strips, and stain the top. I'm also considering using the composite deck boards (Trex or similar) as I've seen done on some trucks.

My question is whether there would be a structural integrity advantage that would "require" the use of a single one-piece floor (plywood). Or, once everything is bolted down, the individual boards (Trex) would not matter, as far as rigidity.

Thanks in advance for any and all opinions and info!