Which structural system is designed using two or more materials to work together in load resistance?

The correct answer highlights Composite Construction, which is the practice of using two or more materials in a structural system to optimize their individual properties and to achieve a balance in load resistance. By combining materials, such as steel and concrete, designers can create a system that takes advantage of the compressive strength of concrete and the tensile strength of steel, resulting in a more efficient and effective structural assembly.

This approach allows for lighter structures with improved performance under various loads, including live loads, dead loads, and environmental factors. Composite systems are commonly employed in beams, slabs, and even full buildings, where the interaction between different materials can lead to enhanced structural integrity and longevity.

Monolithic Construction involves creating structures from a single continuous material, typically concrete, which does not incorporate the advantages of multiple materials working together. Precast Construction refers to elements that are cast off-site and then transported for assembly, while Modular Construction involves creating sections of a building off-site that are later assembled on-site, neither of which emphasizes the collaboration of different materials to achieve load resistance like Composite Construction does.