Manhattan, NY According to Related Companies and Oxford Properties Group, developers of the $20 billion Hudson Yards redevelopment, 30 Hudson Yards has officially topped out. The final beam was placed on the steel crown on July 17th. The 1,296 ft. tall building is made up of more than 40,000 pieces of steel weighing 91,500 tons, 1.25 million bolts and enough welding to cover 196 miles.