Army and Navy barracks may one day be 3D printed or built using mass timber construction that involves large wooden structural beams manufactured from smaller lumber… Additive construction — 3D printing buildings — high performance cement and concrete mixes, geosynthetics, mass timber, composite materials, industrialized construction, tension fabric structures and carbon fiber reinforced polymers were all part of the discussion with lawmakers about how the Army and Navy can develop the most cost efficient and resilient military construction projects… In Hampton Roads, Virginia, the Navy is now piloting the use of mass timber, also called cross-laminated timber (CLT)… “Department Of Defense (DOD) has expressly acknowledged the applicability of CLT with the creation of a guide specification,” Hamilton (chief engineer for Naval Facilities Engineering Systems Command) said. “As the CLT construction industry matures, CLT may prove more competitive and could be utilized more broadly in DOD construction.”