What purpose do moment connections serve in girders?

Moment connections are specifically designed to provide lateral stability in girders by allowing them to resist bending moments generated by various loads. When a structure experiences lateral forces, such as wind or seismic activity, moment connections enable the girders to maintain their position and stability by effectively transferring these forces through the structural system.

Unlike other connection types that may merely support vertical loads or simplify installation, moment connections ensure that girders can handle both vertical and horizontal forces, enhancing the overall integrity and stability of the structure. This is crucial in preventing excessive deflection or failure during lateral loading conditions, thereby contributing to the safety and performance of the building.