viter said:http://www.fordvehicles.com/2009f150/?bannerid=364693|24543588|209794765|0&referrer=N3016.Primedia
click on the "DURABILITY (silver creek)" link at the bottom left corner of the page and watch the flex of the truck bed next to cab for the 4 trucks shown (f-150, tundra, silverado, and dodge), then think about what would happen if there was a rigid rack installed between bed rails and cab roof without stiffening the rest of the structure with a real "cage" like in race vehicles, as pointed out earlier.
I just think that video is cool!
Ruffin' It said:What about mounting the rack to a vehicle's (custom frame mounted) rock sliders instead of the body? Get rid of the majority of the cab/bed/frame flex issue. Just a thought.