Why are trusses used in structural systems?

Trusses are primarily used in structural systems to minimize material use while effectively supporting loads. They achieve this through their geometric configuration, which distributes weight efficiently across the structure. The triangular shape of a truss provides maximum strength with minimal material, allowing for large spans that would otherwise require much heavier and more expensive materials if using solid beams. This efficiency is crucial in construction as it leads to cost savings, lighter structures, and reduced material waste. While other factors such as simplifying construction processes may play a role in structural design, the hallmark advantage of trusses is their ability to provide robust support with optimized material usage.