Emergency Shoring Underway at Buckling Manhattan High-rise

By the Editorial Team · Thursday, July 9, 2026

A partial collapse caused by buckled steel beams forced the evacuation and emergency stabilization of a Midtown Manhattan high-rise undergoing a major office-to-residential conversion. Officials are investigating the structural failure’s cause, focusing on altered load stresses from the renovation, while determining next steps to ensure safety before the project resumes.

Emergency crews have stabilized a Midtown Manhattan high-rise after a structural failure caused a partial collapse and a large-scale evacuation earlier this week. The building, located at 235 East 42nd Street, was undergoing a major renovation converting the former Pfizer office tower into residential apartments. The conversion project, which began in 2024 and is expected to deliver 1,600 units by 2027, is considered the largest office-to-residence conversion in New York City’s history.

The problem was first identified Tuesday morning when two steel support beams buckled on the building’s 21st floor, prompting an immediate evacuation of the structure as well as nearby streets and adjacent buildings. Authorities established a "frozen zone" restricting pedestrian and vehicle traffic in the area between Second and Third Avenues on East 42nd and 43rd Streets. By Wednesday, the restricted zone was significantly reduced but four neighboring buildings remained under full evacuation orders, and a fifth had a partial vacate order related to a ground-floor restaurant.

Mayor Mamdani and city Department of Buildings (DOB) officials confirmed that emergency shoring was installed using galvanized steel beams and jacks from the ninth floor up to the roof of the 37-floor building. As of Wednesday, crews had completed shoring on floors 18 through 23 and were continuing work above and below those levels to stabilize the entire structure. Photographs released by the DOB showed solid steel supports in place next to the visibly bent beam responsible for the failure. Mayor Mamdani stated there had been no further movement since Tuesday morning and that monitoring efforts were ongoing.

The cause of the structural failure remains under investigation. The affected area lies beneath a "bump-out" addition spanning the building’s 23rd to 32nd floors, which was incorporated during the renovation to extend upper floors horizontally. Engineers noted that converting office spaces to residential use involves complex changes to load distribution, and that the building’s original design, more than 40 years old, may not have accounted for those altered stresses during construction. Experts cited factors such as improper loading of construction materials or unforeseen stress on modified structural elements as possible contributors.

A full forensic investigation is planned once the building is fully stabilized. The DOB will conduct a comprehensive review of architectural plans, construction documents, witness interviews, site inspections, and any available video or photographic evidence. The investigation aims to determine how the failure occurred, whether there was any negligence, and to develop recommendations to prevent similar incidents in the future. The DOB has indicated enforcement actions could be taken against responsible parties based on the findings.

Local residents expressed varying opinions on the building’s future. Some voiced concerns about safety and urged complete demolition, citing fears that a collapse could happen again. Others weighed the environmental impact of demolition and hoped the structure could be safely salvaged if thorough repairs and reassessments are made. City officials have emphasized public safety as the foremost priority before any decisions on the project’s continuation are made.

This article was reported by synthesizing coverage from multiple independent news outlets to present a balanced, unbiased account. Read about our editorial standards. Spotted an error? Let us know.