Aluminum slide gates are suitable for manual or automatic gate operation. These gates comply with the latest industry safety standards for automatic gates (UL 325 and ASTM F2200-02) and are appropriate for single gate openings up to 40 feet (up to 80 feet for double gates). Aluminum cantilever gates can be operated by a variety of electric gate operators (chain or hydraulic drive). The frame is supported from the track of extruded aluminum alloy by two self-aligning, 4-wheeled, sealed lubricant and stainless steel ball bearing truck assemblies. The enclosed “trucks” are protected from dirt and weather and provide effortless operation, eliminating pinch points without need for roller covers.