30 East 31st Street

This new, 40-story, residential condominium building is comprised of concrete flat plate slabs with a lateral system of shear walls and beam-column moment frames. The extremely slender building has an aspect ratio of 1:13 so, to ensure resident comfort, the structural design includes a tuned mass damper at the top of the building to control sway and incorporates the distinctive architectural lattice feature of the façade into the lateral system.