Wooden parking platforms?

[suprz]

Has anyone made one? Right now i park on 2X8's. But i would like to build some actual platforms made out of 2X8's (2 side by side for the front, and 3 side by side for the rear duals.) the problem is i don't want to use wood screws to make the platforms for fear of the screws working loose, and i doubt any glue is going to hold up to a 7 ton rv being parked on it. Right now, gravel and concrete are not a economical consideration... Any ideas?

[Mfan]

How about bolts?

[troubledwaters]

A couple of concrete pads, 16" wide x 24" long (or whatever you need) x 9" thick would be pretty cheap to construct with "quickcrete" and a shovel (can even throw in some #4 bars for insurance).