Hi Kelly, CADWorx Steel is the precursor to CADWorx Structure from many moons ago. Those steel objects use a different data format entirely. For users that alot of older CADWorx Steel models, there is a method to convert them to behave like Structure objects so they can be manipulated.

Regarding your question on 2D, it looks like you are looking for the 2DREPSTR and 2DREPHSTR functionality.