The first steel beams of JP Morgan Chase‘s 1,425-foot supertall have begun to rise at 270 Park Avenue as work continues on the demolition of its 52-story former headquarters in Midtown East. The new steelwork is being assembled on the Madison Avenue-facing side of the parcel, where a low-rise podium once stood, while the main 707-foot-tall skyscraper formerly known as the Union Carbide Building continues its descent toward Park Avenue. The new tower will eventually span the entire block between East 47th and 48th Streets from Park to Madison Avenues and yield 2.5 million square feet of office space.
Recent photos show the massive scale of the newly welded steel members, which appear to be the first in the series of exposed angular supports at the base of the tower, as seen in the massing diagram below. Upon closer inspection, half of the outline of what appears to be an elongated octagonal framework of columns and beams is also visible. Wooden platforms have been assembled to enable the red construction crane to traverse the site.
Meanwhile, demolition work is reaching the last group of floors of the former headquarters, with the wrap-around metal scaffolding and black netting being steadily removed with each dismantled level. A sliver of the tower’s façade can still be spotted along Park Avenue, a final reminder of its mid-century design. We could likely expect demolition to reach street level by early spring. When complete, 270 Park Avenue will become the tallest building to ever be peacefully demolished, taking the distinction from the Signer Building, a 612-foot-tall skyscraper in the Financial District that was razed in 1968.
Few details are available regarding the new supertall, with no official architect, final rendering, or construction timeline yet announced.