Source for steel in Bay Area?

3/16 for angle and I was thinking maybe 1/8 for the tubes? I'm a newb so if something sounds stupid, lmk.

 

I just dont like it. Angle iron is almost always (maybe always) hot rolled and has a scale on it. It is not as strong as a cold rolled square tube. If you try to cut one side of the angle off and bend the remaining flat piece, it typically fractures at the bend.

You can come by my place in San Jose and plasma cut all the square stock you want. Just have to fit into my schedule which isnt always that easy.