What ship to get cargo into orbit?

Hey everyone- I'm wondering what kind of vessel would most entities (corporations) use to haul bulk cargo from the surface of a planet into orbit? Anyone ever seen a write up or deck plan for a vessel like that? I guess it would have to be a HS 4 or 5 system ship streamlined for atmospheric travel, etc. I'm having a hard time getting my mind around how something like that would be economical though considering the mass of things involved.