Nestled in the heart of Bangkok’s Chinatown, the Ong Ang Canal served as a vital trade artery in the 18th century. Over time, it became heavily polluted, and even earned a reputation as the city’s dirtiest canal. Last month, as part of a broader government effort to revitalize the canal, Siam Cement Group (SCG), Thailand’s oldest cement firm, unveiled the country’s first 3D-printed pedestrian bridge across its waters. The bridge is part of SCG’s drive to bring new construction materials to Southeast Asi ...