An irrigation system includes support towers, pipeline spans, a joint pivotally connecting the pipeline spans, and a truss section. One pipeline span extends between the support towers along a central axis and includes a middle region, and the other is adjacent and coaxial with the first pipeline span when aligned. The truss section supports one of the pipeline spans and includes compression elements, truss structures, and tension elements. The compression elements extend downward from the pipeline span. The truss structures extend longitudinally along the pipeline span and are fixed relative to the compression elements. The tension elements extend diagonally downward from the pipeline span toward the middle region of the pipeline span and are fixed relative to the truss structures.