Yeah, about the time you assume anything on a blueprint that some cad hand in an office drew.....that's when you can go ahead and find another job. It's your fault when you "cant" follow a simple blue print, according to "them". The last time I was on a bent beam job, I asked so many questions, they drew up some different plans,,,,,,,,that we could understand!
Structural guys are a different breed sometimes. If the plans are lacking detail it's not your fault, and you should question the man who drafted them.