Hmmm. I should clarify: "Carp" is the American-Antarctican term for "carpenter", and "carpenters" in the American Antarctic program tend to work with more than just wood. It's not uncommon to see carps with cutting torches or otherwise working with metal - though we also have the tin knockers, ironworkers, welders and so forth for more skilled labor involving metal. Our carps - especially the heavy carps - are sort of all-purpose construction workers.
The term "carp" is not commonly used in America. There are a number of other American Antarctican terms in use as well, that are not used by other English-speakers in Antarctica or in America.