At Tuesday’s groundbreaking of B2, the first 32-story residential tower to be built at Atlantic Yards in Brooklyn, New Yorkers got a sneak peek at how the world’s tallest modular building will be constructed. Just beyond the podium stood what officials call the “chassis,” a steel framed box that makes up an essential structural element of the building. “You don’t need to compromise on design when it comes to modular,” said Developer Bruce Ratner.

Located on the corner of Dean Street and Flatbush Avenue, the SHoP Architects-designed tower will rise above the Barclay Center, also designed by SHoP, and offer 363 units split evenly between affordable housing and market rate units. Ratner told the audience that the affordable units at Atlantic Yards will be equipped with the exact same appliances and amenities as the market rate apartments: “You will not know an affordable unit from a market rate unit.”

The bulk of the construction of the modular components will happen in a 100,000 square-foot space at the Brooklyn Navy Yard with the help of 125 unionized workers, which MaryAnne Gilmartin, executive vice president of commercial and residential development at Forest City Ratner, said would help in the “reduction of traffic, dust, and waste” and Mayor Bloomberg hailed as “cheaper and less disruptive.”

B2 is just the first of more than a dozen residential buildings to come.