Perforated non-skid panel

Claim 1

AN ANTI-SKID DEVICE COMPRISING A ONE-PIECE SHEET METAL PANEL HAVING A MAIN PANEL PORTION WITH ITS OPPOSITE LONGITUDINAL MARGINS TURNED UNDER AND PROVIDING ATTACHMENT FLANGES UNDERLYING THE MAIN PANEL PORTION, THE ATTACHMENT FLANGES EACH HAVING SLOTS AT ITS OPPOSITE ENDS FOR RECEIPT OF MEANS FOR ANCHORING THE PANEL AND WITH THE PANEL BEING CHANNELED IN CROSS-SECTION, THE PANEL HAVING A SERIES OF TRANSVERSELY EXTENDING LONGITUDINALLY SPACED RIBS EXTENDING ABOVE THE PANEL ALONG ITS TOP SURFACE, SAID RIBS EXTENDING TRANSVERSELY ACROSS OPPOSITE LONGITUDINAL MARGINS AS WELL AS ACROSS THE ATTACHMENT FLANGES FOR REINFORCING THE ATTACHMENT FLANGES, AND FRUSTO-CONICAL BUMPS CARRIED BY THE PANEL BETWEEN THE RIBS WITH THE FRUSTOCONICAL BUMPS HAVING INCLINED SURFACES INTERSECTING AT AN EDGE POSITIONED ABOVE THE MAIN PANEL PORTION, THE RIBS AND THE PERFORATED AREAS BEING COOPERABLE TOGETHER TO RESIST SLIPPAGE.