[personx]

Pick ups are ment to carry 4X8 plywood so most beds are over that size at least side wise and the six foot beds are ment to carry them with the tailgate open.

I had been planing to make one out of two pieces of 1/4 inch chip board (a 4 and a 2 foot sections for the 6 foot bed) and maybe cover that with some waterproofing finish or covering. using 1x4 cross pieces (ribs) under it to give it the stiffness that it needs and cut that so it was slighted domed in the center so the rain would run off. but with the dome I could not think of any way to hinge it so I was just going to make it in one piece but you could make it any way you wanted. It was to be cheap so I could try different things and not stress the $$$. Later if i liked one enough I might think about fiberglass.

Now though I think I going to do a full aero cap instead using a different approach but still cheap so I can see what works and what doesn't.