The New York legislature amended the administrative code of the City of New York with respect to safety requirements during excavation and insurance obligations for construction or demolition operations. The amendments were approved and made effective as of August 28, 2007.
1) Support the vertical load of the adjoining structure by proper foundations, underpinning or other equivalent means where the level of the foundations of the adjoining structure is at or above the level of the bottom of the new excavation;
2) Support any increased vertical or lateral load on the existing adjoining structure by the new construction where the existing structure is below the level of the new construction; and
3) Modify the foundation of the existing structure where the new construction will result in a decrease in the frost protection level for the existing structure such that it will fall below the established regulatory minimum.