The New York City Buildings Department carefully specifies materials, application standards, and safety requirements of a building’s structural components.

Structural inspections include wood and steel construction and fabrication process, its welding, structural safety, and erection. Masonry is inspected according to the building classification. Concrete construction must be inspected according to code. High strength bolts, nuts, and washers are monitored and periodically inspected. High-pressure steam piping and its welding process are inspected. Site preparation, soils, underpinning, and pier foundations are inspected according to code.