The steel superstructure for JP Morgan Chase‘s new 1,425-foot supertall headquarters continues to rise on the western half of 270 Park Avenue‘s full-block parcel as work progresses on the demolition of the company’s 52-story former home on the opposite end of the Midtown East lot. Construction workers are busily lifting and welding new steelwork along Madison Avenue between East 47th and 48th Street, where the low-rise podium of the original 707-foot-tall skyscraper formerly known as the Union Carbide Building once stood.
Recent photos show the rapid progress on the superstructure of the 2.5-million-square-foot skyscraper since our last update a month ago, when the first steel beams began to emerge from the site. Numerous construction cranes are assembling the massive framework that will eventually culminate in one of the tallest buildings in the city.
Photos featuring construction workers reveal the scale of the colossal dimensions of the steel columns for the dramatic angular base, which will be a clear focal point in 270 Park Avenue’s design. Temporary metal scaffolding columns have been erected to support portions of the steel and will likely remain in place until more components are welded to bolster the frame’s integrity. Rectangular platforms with wooden floors have been built for crews to work closer to the joints in the steelwork.
Perhaps the most interesting section of the steel assembly features four long diagonal columns fanning out from a single point. This can be seen in the photographs below.
Meanwhile, the original building continues to be dismantled with light clouds of dust blowing across the top of the highest floors from multiple excavators tearing apart the old office levels. Only a handful of floors remain above the main lobby, and temporarily rest behind the black netting and scaffolding.
Other photographs below show the intricate steel connections rising from the ground in a complex matter.
A final rendering and completion date for 270 Park Avenue have not been released.