TC bends frame of Dually - pic

The pickup versions of the F350 and F450 frames are 6.87 X 2.36 X .264 using the 2010 model year as an example. The cab & chassis versions are heavier in both cases...the F350 is 7.50 X 2.74 X .280 and the F450 is 7.50 X 2.74 X .320 up to .600 depending on wheelbase. The badges on the body of the truck don't tell you a whole lot anymore...you have to really dig into the specs to know what you are buying...and don't bother asking the sales people...they have no idea. To really get answers...it takes a good fleet guy...and I have found that a really good source is the after market body builders. By the way...here is a link to some recent body builders info from Ford...very enlightening.

https://www.fleet.ford.com/truckbbas/topics/techspec.html