Mark Jenkins | The Washington Post | December 16, 2016 The “Timber City” exhibition is at the National Building Museum through May 21. (Yassine El Mansouri/National Building Museum) Anyone who looks up while walking Washington’s streets can reckon what the building material of the future is. Most new structures feature glass walls, which have turned… Continue reading Skyscrapers Made of Wood? NBM Show Argues for Alternative to Steel, Concrete.