Suggest you talk to the Light Steel guys. Most Aust fabricators assemle in the shop and Tek screw to all studs. We have researched it and found no problems. We also have tensioners (standard item) that we place on all sections to make sure sections are rigid.
Les McGrath
Your angle seems very heavy. Have you contacted the Light Gage Steel Engineers Association? Don Allan is their ED. They have a number of standard sections and deemed to comply provisions I believe. Here in Aust I would probably be using a 2 or 3 mm thick angle but of course depends on your load...
I have a contractor who has placed panels up to 4 inches out of plumb. Panels are 26 feet high. Has anyone a reference to an acceptable out of plumb tolerence for panels?