Which method allows for spanning large areas without the use of interior columns?

The method that allows for spanning large areas without the use of interior columns is bow string construction. This type of construction utilizes a curved, triangular design that distributes loads effectively, enabling structures to cover wide spans while maintaining structural integrity. The arch-like shape of the bow string provides strength and rigidity, making it well-suited for applications such as bridges and large open spaces in buildings.

While other construction methods also span large areas, they may not achieve the same level of flexibility in design or as effectively minimize the need for interior columns as bow string construction does. Understanding these characteristics is important when considering structural design options in fire safety and building practice.