Photography for the PDX Airport Main Terminal This expansion in Portland stands as the largest mass timber project ever undertaken. The 3.5 million board feet of wood used in the roof, concessions, flooring, and feature walls were sourced from within a 300-mile radius of the airport. The wood includes contributions from small family-owned forests, non-profits, and tribal nations. This sustainable approach by the architects at ZGF both supports local economies and highlights Oregon’s tradition of forest product innovation.