And material type and more importantly, material quality. In my industry though, I've seen plenty of good parts manufactured right along side of bad parts - it comes down to supplier quality control. But that costs $$. I don't even have to deal with material type and material quality because that stuff is well controlled for me. But steel is not the same as heat treated steel or high strength steel. Not to mention all of the different steel alloys.Racks are not complicated and are primarily made of two factors:
1. Material Thickness (Gauge)
2. Construction Type (Weld vs Bolt, Steel vs Aluminum)
I'm not saying R&D is not involved, however you can only optimize basic science of an item before you are left with no other advertising options than using whatever buzzwords are currently the fad.
Well all I can say I learned is, doing some basic research and buying the components and building myself is astronomically cheaper than buying something of similarity off the shelf.snip