A fence section includes an upper horizontal rail and a lower horizontal rail extending along respective upper and lower rail axes. A horizontal upper wall of the upper rail includes apertures spaced apart along the length of the upper rail. Vertical members extend beyond the upper wall through an internal cavity of the upper rail and through a respective aperture. The upper rail includes a first counterpart of a connecting structure for connecting at least one vertical member to the upper rail, the first counterpart being integrally formed with the upper rail. The at least one vertical member includes a second counterpart of the connecting structure, the second counterpart being integrally formed with the vertical member and configured to directly engage the first counterpart of the upper rail upon insertion of the vertical member through the respective aperture in the upper wall of the upper rail.