What is required for steel trusses over 60 feet in span?

For steel trusses that span over 60 feet, it is essential to have them designed by a licensed engineer. This requirement is in place because longer spans involve more complex structural engineering considerations to ensure safety, stability, and compliance with building codes. The unique loading conditions, structural interactions, and the material properties of steel necessitate an engineered approach to ensure that the trusses can adequately support the intended loads.

A licensed engineer possesses the expertise to perform the necessary calculations and design evaluations required for such significant structural components. The involvement of an engineer helps mitigate risks associated with structural failures, ensuring that the design adheres to local building codes and industry standards.

In contrast, although standard installation methods, a manufacturer's approval, and prior building inspections may be necessary parts of the construction process, they do not replace the critical need for a licensed engineer's design for large spans like those exceeding 60 feet. These aspects are important but are not sufficient on their own to address the specialized requirements of structural integrity for such significant trusses.