ترجمة - أوكراني-ألماني - Несуча частина : блок-ферма

There don't seem to be many people who speak Ukrainian and German, so the poll doesn't help me validating this translation. Could you please be so kind to give me an English bridge for that one? Thank you!

CC: ramarren slbgz Melissenta afkalin

"Несуча частина" = base, basis, foundation, main construction, support, main part of construction, framework etc ... IMHO

And what does "блок-ферма" mean?

"блок-ферма"
this is the technical term, that means construction of building's roof.
http://de.wikipedia.org/wiki/Fachwerk