This invention relates to a gate or panel for a storage container comprising a rectangular or square infill panel having an inner face and an outer face, an outer perimeter frame adjacent to the outer face of the infill panel, and an infill panel attachment member attached to and extending along at least a pair of opposing margins of the gate, each infill panel attachment member comprising an infill panel retaining flange which extends in a plane parallel to an inner face of the perimeter frame so that the infill panel is retained between the retaining flanges and an inner face of the outer perimeter frame.