نص أصلي - انجليزي - first fix joiner second fix joiner

These are woodworkers of some kind - like cabinet makers.

http://www.buildstore.co.uk/materials/carpentry.html
I've found some information about the categories, in fact there are three categories, "first fix joiner", "roof", and "second fix joiner". But I still can't make an idea about the equivalent in French language.

I guess you'd better ask a charpentier français.

Yeap, it is really stupid, as I've spent a big part of last night with a very talentuous one (cabinet maker), listening at some very good music plaid by an excellent local group, and although I once thought about asking him, I forgot. I've got to note everything in order to remind, it is terrible!