I was told by a contractor who I sub for that Georgia DOT requires this to be done, along with all of the other ridiculous stuff. I looked at 2 of his service trucks that are equipped to weld and neither were mounted like that. Maybe he just needed something to talk about. I have worked off a trailer for 2 years and never had any problem. Thanks for clearing this up for me. I am trying to locate this official DOT regulation but cant find any info on this.
If this is true, have him cite the article, chapter, and verse. There would then be specific instructions, including materials, regarding procedure.