[Cory]

In the past we have used 1.5" aluminum angle, 1.5" steel angle (terrible, terrible choice, never use this stuff EVER! Way too heavy) and 1" 80/20 extrusion. For ease of use and the ability to make quick changes without having to cut welds or drill holes, 80/20, or Bosch extrusion is king. However, the expenses involved with fasteners and the material its self quickly pile up, as does the weight. I remember reading somewhere that 1" square profile aluminum gives much more strength than 1" angle for the same weight.

Cory