Richmond, Virginia – CJGeo has used TerraThane geotechnical polyurethane foam from NCFI to repair a New York City building with significant structural problems.
The 12-storey building is near Madison Square Garden in Manhattan, New York.A building inspection found it had floors which had dropped by over an inch (25 mm).
An engineer from environmental services specialist DPC discovered that this was caused by voids beneath the slab. The voids formed as the building settled into its foundations. These were built on fine silt, sediment, and back-fill from a previous building.
CJGeo was called in to use geotechnical polyurethane foam to fix the problem. ‘Second and third generation buildings in Manhattan were often constructed over poorly-placed fills used to cover previous structures,’ said CJGeo’s chief estimator Kirk Roberts.