The Hearst Magazine Building is supported by steel columns at its perimeter. The original framework was intended to support at least seven additional stories. Urban's original plans for the tower no longer exist, but by some accounts, the completed building would have been up to 20 stories tall. The Hearst Magazine Building also had six elevator shafts, double or triple the expected number of elevators for a building of its size. As completed, there was a white-brick penthouse above the sixth story for the future expansion of the elevators. The Hearst Magazine Building's entire original framework was removed when the Hearst Tower was constructed in the 2000s. The existing structure was hollowed out to create the atrium for the expanded building, and new columns were installed behind the existing facade. Large "mega columns" extend downward from the perimeter of the tower addition. The existing frame and new columns are connected with beams at the third and seventh stories. Additionally, there are eight "super-diagonals" sloping from the third floor to the tenth floor.