Building a bed rack

So I'm thinking about building a bed rack. I have it laid out so it will sit about 10 inches above the bed rails and bolt to the bed track. I have a bunch of aluminum 1 1/2 x 1 3/4 and looks to be just under a 1/8" thick. My question is to anyone who has done this is my aluminum going to be strong enough to support a couple of coolers maybe a shovel and high lift jack. I do not have and engineering degree nor have I had much experience with aluminum, always built stuff with steel

 

that aluminum box section ? yes it is plenty strong
any weakness will be dictated how you assemble the final result

 

Yes it's post material from house trailer awnings I have a bunch of it leftover from jobs

 

2" emt welded with a gas less mig. 50" led light bar. $16/10' piece of emt and used 3 pieces. $15 for the 90 degree fittings and used 1.

 

Didn't even think about emt I have the tools to bend that stuff to. Think I'm going to stick with the aluminum on this project just cause I've never worked with it. Something new

 

DIY bedrack is best bedrack

 

@Overkill07