Which way will it twist?

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Someone made a comment about knowing how some tubing was going to twist when he welded it up.  Any tips on learning how to figure that out?
Reply:Practice.  The weld always pulls on the material.
Reply:If you imagine pinching the material together wherever you weld you can figure what it will do. It is very predictable, but takes welding time to figure out how much.
Reply:there are lots of variables to wich way and how much a given material will move or twist when welding as was said before it takes practice and an eye for detail i used to have a boss who would get on to me because i couldnt make everything come out perfectly strait and square i watched him over and over and finaly i figured out what he was doing he was pre positioning the material so the weld would pull the metal plumb. That man was one of the best welders i have met learned as much as i could from him ..mabey hook up with and old welder?
Reply:When welding thin wall square tubing, say 2"x2" 16 gauge, does anyone ever use an air blower to cool the metal, so you can go on welding?  Or is that too much like dipping it in water and will make it brittle?
Reply:Originally Posted by texasrednekthere are lots of variables to wich way and how much a given material will move or twist when welding as was said before it takes practice and an eye for detail i used to have a boss who would get on to me because i couldnt make everything come out perfectly strait and square i watched him over and over and finaly i figured out what he was doing he was pre positioning the material so the weld would pull the metal plumb. That man was one of the best welders i have met learned as much as i could from him ..mabey hook up with and old welder?
Reply:yeah most of what i did was aluminum and with a 16% puddle shrinkage and his expectation of 1/32 tolerance it was tuff at first but he helped me alot when ever i get a new job i find the oldest man with a welding cap on and buy him lunch lol....the most invluable comodity is knowledge and experience