Im pretty sure the rails alont the truck will hold up just not the cross beams of course.if you look at my pic i built a steel roof rack from the very front of the truck to the very end.it weights roughly about 90lbs, i have gotten on it while bolted up there and walked around it no proble, i weight in at 255 lbs,it currently just holds my spare and light bar and high lift arb canopy on the way.i am trying to load more pic of my set up but time is of the essence.