Two-thirds of the building’s foundation sit on slabs atop the Metro-North Railroad's yards, just north of Grand Central Terminal, rather than being attached to the bedrock itself. The tunnels also required Bear Stearns to move HVAC and mechanical equipment that would usually sit in the basement up higher in the building.[2] The building utilizes 285,866 square feet (26,557.8 m2) of air rights from the terminal's yards.[3]