Some of steel were used in the tower's structural frame. The footings of the tower are deep, supported by twelve columns on the edges and eight columns inside the plot, and anchored to a layer of bedrock between deep. The main columns at the tower's corners measure . They bear structural loads of up to when wind pressure was taken into account. The structural steel frame of the tower, and of its former east wing, is encased in reinforced concrete. The marble and brickwork used in the building is anchored to the structural steel frame, while the floors are made of inverted concrete arches. As a consequence of all the marble used in the Met Life Tower, it weighed about when first built, or about twice as much as the Singer Tower.