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There are many tools that can create columns. This video discusses using posts, railings, polyline solids and library objects for this purpose.
Posts Beams and Columns
407 - Drawing Columns Using Molding Polylines and 3D Solids
408 - Creating Stacked Columns and Converting Them into Symbols
330 - Drawing Columns Using Posts, Railings, Polyline Solids and Library Objects
329 - Drawing Exposed, Sloped and Decorative Beams
5314 - Working with Post Tools, Framing Labels and Edit Tools
328 - Framing a Floor with the Beam and Post Tools
405 - Drawing Decorative Beam or Truss Symbols
5203 - Using Bearing Walls, Beams and Lines