New Mesh. Round center pillar. Single Story column. Those thin columns are usually placed in a group of 4. Making a new mesh object with the 4 columns would result on a high poly mesh. However you can use the game cheats: "move objects on" and "boolprop snapobjectstogrid false" to place 4 columns as shown in the pic.
I’ve changed my policy about cloning or recoloring my Sims 2 objects. Read HERE for details.
New objects for The Sims 2 are currently in Beta stage. They run safely in The Sims 2, but you should use them at your own risk. Recolored objects will require you to download and install the CEP – Colour Options Enabler that can be found here: