Double-skin tubular (DST) refers to a structural system commonly used in construction that involves two concentric tubular layers with a gap in between, which can be filled with concrete. This system is particularly effective in environments that require enhanced load-bearing capacity and resilience against environmental impacts such as earthquakes, wind, and water ingress. The use of DST in cement and concrete applications significantly improves the structural integrity and durability of buildings and infrastructures, making it an excellent choice for challenging environments.