High Strength/Load-Bearing Capacity Designed to withstand heavy loads, often categorized as Light Duty (LD-2.5 tons), Medium Duty (MD-10 tons), Heavy Duty (HD-20 tons), or Extra Heavy Duty (EHD-35 tons) for various traffic conditions (footpaths, car parks, main roads, highways). Durability and Longevity: Highly resistant to impact, corrosion, and harsh environmental conditions. available in various shapes, primarily Round and Square/Rectangular, with different clear opening sizes and overall dimensions Often comes with a corresponding frame and may include features like lifting hooks and sometimes a peripheral steel strip for edge protection.