The crown jewel of the Portland International Airport's massive $2 billion expansion is the upcoming mass timber roof for the main terminal.

The undulating edge of the roof will become the cursive signature of the airport, if not the whole city. The TCORE, or Terminal Core Redevelopment project, will see the main terminal transformed into one giant space with picture windows and round skylights, filled with live plants and a ceiling decorated with a lattice of woodwork.