Manhattan building conversion collapses after missing steel reinforcement

On July 7, two columns in the former Pfizer headquarters at 235 East 42nd Street buckled, forcing an evacuation of the surrounding blocks. The 37‑story tower was being converted from office to residential space by developer MetroLoft, with plans calling for steel plates to encase the existing I‑shaped columns and turn them into box‑like pillars supporting fifteen added floors.

Engineers reviewing the structural drawings and photographs say the required reinforcing plates were not installed, leaving the columns unable to bear the extra load. GACE Consulting Engineers highlighted that reinforcement from the 19th to the 21st floor was missing, and observed that the visual evidence did not match the design specifications. The New York City Department of Buildings has not yet determined the cause, and MetroLoft has not commented on whether the reinforcement was ever installed.

The incident prompted city officials to declare the building structurally sound after emergency shoring, but highlighted potential gaps in construction oversight for large‑scale conversion projects.