Hi,
Concretemasonry, being a structural engineer practicing in Bulgaria and I disagree with the part about "is a little behind others in technical construction".
If you refer to the building systems that may be partly true due to the cost involved with introducing some of the new technology. But with regartd to codes and design practices it is not quite true. As an example we have had limit state design in our codes long before some other advanced countries introduced it in their codes. And it is not only about the codes, but the engineering itself that is far from being "behind others" (which others - the rest of the world, or only some chosen "others").
"Bigger and heavier" was already discussed. As for the Eurocodes - indeed they had to be introcuced this year as a parallel valid code to make transition smoother. Anyway most of the practicing engineers are familiar with the EC requirements, so you will find common language.
To answer the question ibc is not a valid code. as mentioned we use local codes (bult mainly on the Russian SNiP) but most of our codes state that it is acceptable to have a member designed to a code that provides safer or conservative. As for online resources - codes are not officially available online (even in Bulgarian language) although there may be some scanned copies uploaded somewhere.
Anyway, you will have to have your set of project documents stamped and legalized by local certified architects and engineers.
Strengi, if you would like to discuss specific BG code issues or any other information (for example names of design companies, etc) please contact me at [mikesg at abv dot bg].
Regards,
Mike