A column apparatus comprising: a bottom portion and a middle portion each including a center pillar, a plurality of corner pillars (220, 230, 240, 250), and a plurality of middle pillars (260, 270, 280, 290); a base, to which the center pillar, the plurality of corner pillars, and the plurality of middle pillars of the bottom portion are affixed onto; the center pillar of the bottom portion being attached to the center pillar of the middle portion; the plurality of middle pillars of the bottom portion being attached to the plurality of middle pillars of the middle portion respectively; characterized in that: the plurality of corner pillars of the bottom portion each include a first bore on a respective top surface for receiving a first section of a threaded stepped dowel (500, 500A, 800, 1010) from a first plurality of threaded stepped dowels; the plurality of corner pillars of the middle portion each include a second bore on a respective bottom surface for receiving a second section of a threaded stepped dowel (500, 500A, 800, 1010) from the first plurality of threaded stepped dowels; and each of the plurality of corner pillars of the middle portion is affixed onto each of the plurality of corner pillars of the bottom portion respectively by the first plurality of threaded stepped dowels. a bottom portion and a middle portion each including a center pillar, a plurality of corner pillars (220, 230, 240, 250), and a plurality of middle pillars (260, 270, 280, 290); a base, to which the center pillar, the plurality of corner pillars, and the plurality of middle pillars of the bottom portion are affixed onto; the center pillar of the bottom portion being attached to the center pillar of the middle portion; the plurality of middle pillars of the bottom portion being attached to the plurality of middle pillars of the middle portion respectively; characterized in that: the plurality of corner pillars of the bottom portion each include a first bore on a respective top surface for receiving a first section of a threaded stepped dowel (500, 500A, 800, 1010) from a first plurality of threaded stepped dowels; the plurality of corner pillars of the middle portion each include a second bore on a respective bottom surface for receiving a second section of a threaded stepped dowel (500, 500A, 800, 1010) from the first plurality of threaded stepped dowels; and each of the plurality of corner pillars of the middle portion is affixed onto each of the plurality of corner pillars of the bottom portion respectively by the first plurality of threaded stepped dowels. the plurality of corner pillars of the bottom portion each include a first bore on a respective top surface for receiving a first section of a threaded stepped dowel (500, 500A, 800, 1010) from a first plurality of threaded stepped dowels; the plurality of corner pillars of the middle portion each include a second bore on a respective bottom surface for receiving a second section of a threaded stepped dowel (500, 500A, 800, 1010) from the first plurality of threaded stepped dowels; and each of the plurality of corner pillars of the middle portion is affixed onto each of the plurality of corner pillars of the bottom portion respectively by the first plurality of threaded stepped dowels.