Quote Originally Posted by 34_40 View Post
Up here in my section of MA., you would have to do 12" centers even on a house deck when you use Trex! I am not familiar with decking with Trex. I do know that it is NON structural! I think I'd stay away from it for a Car trailer but a short utility trailer should sneak by.. My own utility trailer has the usual low grade 2 x 6 for a deck, only trapped on the ends and is a dozen years old and still looks great. What I removed had been bolted in and around each bolt, the holes wallowed out with rot and the bolts were rotted from being wet around the wood.
I talked to an tech service engineer at Trex and they agreed that I would be OK with supports on 12" centers using their 1.5"thick material, but then I priced out the 3" C channel needed to add the supports By the time I added seven supports and bought two more Trex boards it was going to be between $350 and $400, and I would now have a welding project I'll stick with the pressure treated lumber and be done this afternoon