Abstract: A decking panel is provided having first and second ends and fasteners at each end for releasably clipping the panel to a pair of support or catenary wires. The fasteners comprise hooks for supporting the panel on the wires and at least one finger for resisting lift of the panel from the wires, wherein the hooks and finger or fingers at one end are offset from the hooks and finger or fingers at the other end. In embodiments a cross-member at each end of the panel pivotally supports a lever carrying the finger or fingers, the lever being rotatable between a vertical position where the fingers are clear of the hooks and a lowered position wherein the fingers underlie the hooks for clamping a catenary cable between them, gravity biasing the levers towards the lowered position.