help with angle iron's

[Highpower]

Hi Dave, 

Something else you might want to consider.....
Angle comes in a couple of different forms. Structural (rounded inside corners) or architectural (square inside corners). For your application you might want to go with the architectural angle.

This is just one of many online metal suppliers where you can find all types of metals and shapes. http://www.speedymetals.com/s-5-6063.aspx