While widely accepted in Europe, designers and builders in the U.S. have struggled to take full advantage of mass timber because of current limitations in prescriptive codes.
U.S. Army Corp. of Engineers' researchers, leading a team that recently completed the 3D printing of 9.5-ft-tall reinforced concrete walls for a 32-ft x 16-ft deployable barracks, are setting their sights on a future project--3D printing of concrete roof beams--even before they have put the precast concrete lid on the printed walls.
As congressional appropriators make more headway in producing spending measures for fiscal year 2019, construction industry officials see encouraging numbers so far for key infrastructure accounts, including highways and water programs.
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