Description

A moment connector (often called a moment connection in structural engineering) is a rigid structural joint designed to transfer bending forces (moments) as well as shear between connected members, such as beams and columns in steel or reinforced concrete frames. Unlike simple pinned or shear connections that only transfer vertical or horizontal shear forces and allow rotation, a moment connector resists rotation and maintains the relative angle between members, helping the structural frame act as a unified, rigid system under load. Moment connections are critical in structures that must withstand lateral forces (e.g., wind or seismic loads) because they help distribute bending stresses and increase overall stability. In practical terms, these connections are created using bolted plates, welds, or specially designed connectors that ensure a secure, stiff join between elements so that both shear and bending forces are safely transferred. They are widely used in steel building frames, reinforced concrete structures, and engineered couplers where maintaining structural continuity and strength is essential.