[FrankJ]

If your 1/4 plate is .22 to .24, you ordered a gauge thickness rather than 1/4 plate.

1/8x1 tube is virtually the same weight as 1" 80/20.

This year we used a lot of 1/8x1 angle. Half the weight of the equivalent channel & allows bolts to be properly torqued without crushing the section.

We use mostly 1/4-20 bolts. A little heavier than other options, but you don't have to worry about the inexperienced over torquing them. Carroll Smith has a great book about fasteners "Nuts, Bolts, Fasteners and Plumbing Handbook"

It is all about the details & trade offs.