I don't know what the capacity of the C channels are, especially on a Jeep. :slaphead

However they are light aluminium and designed to hold down loads in the bed so will not hold any great weight, (less than 25kg at a guess). I doubt very much whether they could carry the weight of a cage never mind a tent and sleeping bodies.

 

I think he's asking what can be loaded onto the side of the tub, rather than on the C channel rail system. I have no idea either way but I would imagine its not been designed to take a huge weight. Even a bulky hardtop would probably only be 120kg distributed evenly.

 

Yah, I was worried that would be the case and hearing it off some one else puts it to bed.
Onto the bed of the truck is the way to go so. Use the rails on the bottom as a fix point, stop it falling out.

Thanks dude.