well, part of our 4 year apprenticeship was a week of welding, in helmuts that were at least 20 yrs old and superheavy ugh. Stupid thing is that a carpenter is not allowed to do welding here unless you have a welding ticket, and one week aint gonna cut it. Anyhow, yes, I specialized in concrete and formwork (highrise) simply because of the job market situation.
in order to be hired to frame houses, you usually have to be part of a framing crew, and up here, most crews are paid piece work and not by the hour, so they wont take an apprentice on. I did 4 years of concrete/formwork, 6 weeks of framing, and only 4 weeks of finishing carpentry (again, if you are spending a thousand dollars on oak doors, no-one will let an apprentice be the one to learn how to drill the holes in the door for the hardware)
I quite enjoyed highrise though. We pour a floor a week, and so in 6 months you have a 24 storey highrise!
you *were* an architect...what do you do now?