Its a structural framing system ... I use it from building frames for machines but is great from a roof rack ...
The aluminum is pretty cheap it self , its when you get into the brackets and hardware is when it ads up .
http://www.mcmaster.com/#structural-...ystems/=dy31fd
I'm doing 1/8 aluminum as a deck on top of that and going with a side railing and mount brackets on the front of the rack for offroad lighting .
That rack is over 8ft long and dose not look it .