CHICAGO – Claiming it will be the largest mass timber structure in the United States, real estate developer Hines will build a six-story, 270,000-square-foot office building on Chicago’s North Side. Fire-resistant and environmentally-friendly, the proposed T3 Goose Island building (T3 for timber, technology, and transit – and located in a former Goose Island lumberyard) would be the largest cross-laminated timber (CLT) building in the United States. The building is proposed by Hines, a Houston-based real estate developer responsible for a similarly-constructed 220,000-square-foot seven-story apartment complex in Minneapolis, also named T3. Hines also has plans for a mass timber office building in Atlanta, and the firm wants to develop similar buildings throughout the country, said Steve Luthman, the Hines senior managing director who oversaw the Minneapolis project.