Re: Remove load bearing wall
Ditto to all previous postings. You'll need an engineer to calc and provide plans for a retrofit of this nature. Trying to support an 18' span alone is tough enough, you want to support a second story as well, no small order - call an engineer, well worth the time and money, honestly. Keep in mind that just because you call an engineer for this portion doesn't mean you cant do the majority of the work yourself. Only an engineer can suggest a suitable structure and materials to carry the designated loads within the confinements of your space.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!