A structural assembly may include a first prefabricated structural element having a first angled face at an end of the first prefabricated structural element; a second prefabricated structural element having a second angled face at an end of the second prefabricated structural element, the end of the second precast barrier segment connected to the end of the first prefabricated structural element; and a coupling assembly connecting the first angled face of the first prefabricated structural element to the second angled face of the second prefabricated structural element. The coupling assembly provides shear and moment continuity across the first and second prefabricated structural elements. This allows for a variable gap due to manufacturing tolerances, construction tolerances, and/or expansion or contraction.

A barrier system includes first and second barrier segments connected to one another. The connection between the segments includes a pair of wedge-shaped connectors disposed between angled faces formed at the opposing ends of the segments. Elastic pads are sandwiched between the respective segment faces and connectors.