There does appear to be metal structure, but in this photo you can see the beams between the metal appear to be mass timber: https://design-milk.com/images/2024

There does appear to be metal structure, but in this photo you can see the beams between the metal appear to be mass timber: https://design-milk.com/images/2024/12/ZGF-Portland-Airport-5.jpg https://design-milk.com/images/2024/12/ZGF-Portland-Airport-... This has more information about the structure including diagrams: https://www.zgf.com/work/5683-port-of-portland-pdx-airport-main-terminal-expansion https://www.zgf.com/work/5683-port-of-portland-pdx-airport-m...