A new building material is making waves in the architecture industry. But, really it’s a material quite familiar to all of us: wood. Wood is making it’s comeback in the form of cross laminated timber, a surprisingly strong building material that can form the skeleton of even tall buildings, perhaps higher than 40 stories. But what is cross laminated timber? Benton Johnson, a structural engineer at the renowned U.S. architectural firm Skidmore Owings & Merrill, explains.