if you was to ask me to weld a steel shelf up or repair a car exhaust then id happily try learning it but its getting the frame squared perfectly and then making sure the steel that the rail goes on is welded down with no twist ect that scares the shit out of me. i see these sort of comments that makes me understand and feel better

"Clamp your work to a surface that will keep it square, use plenty of tack welds, and dont weld opposite corners because it will tend to push your square into a paralellogram."

and then this straight after that buts me back to square one lol

"if you have a part that must be square, simply make a lighter root pass to hold everything in place, then fill the joint up to a level that is nessecary.

Also if you are welding thick metal, pre heat it, it will prevent cracking of your welds, and it will prevent "pulling" by the weldments."