outlet boxes on round support poles

[mattsilkwood]

This is what I like to use for the thick beams, otherwise I use Cadpoint's style of screw for the thinner stuff like Z channel, sheetmetal, etc.

those are exactally what i use they are pricey but compared to labor they are a godsent. the drillbit on them is pretty wicked to, theyll drill through 1/4" steel like butter.