SHoP refines the design of the Atlantic Yards B2 Tower as groundbreaking approaches. (Courtesy SHoP)

On Wednesday, Forest City Ratner made it official: the world’s tallest prefabricated building will be coming to Brooklyn with a groundbreaking date set for December 18. As AN outlined in our recent feature on Atlantic Yards, the SHoP Architects-designed B2 Tower will climb, modular unit by modular unit, 32 stories on a slender wedge-shaped parcel adjacent to the new Barclays Center on the corner of Flatbush Avenue and Dean Street.

Renderings released with the groundbreaking announcement also revealed design revisions to the B2 Tower since it was unveiled in November 2011, and Chris Sharples, principal at SHoP, told AN what’s new.

Continue reading after the jump.