In urban road upgrades, main road maintenance, and high-standard municipal projects, the "bumping" problem caused by grate settlement severely threatens traffic safety and road longevity. The Luzhongbao 500×600×120 Ductile Iron Anti-Settlement Circular Grate innovatively integrates high-strength materials and structural design, specifically engineered to eradicate settlement issues. Cast as a single unit from QT500-7 ductile iron in strict compliance with GB/T 23858 and CJ/T 327 anti-settlement grate standards, its 120mm ultra-thick frame and grate integrated design effectively distribute loads to the road structural layers, completely eliminating settlement caused by loose backfill soil around traditional grates. It is a revolutionary solution that enhances road flatness and ensures smooth vehicle passage.
Its unique external square (500×600mm) and internal circular structure perfectly adapts to standard circular manholes while providing a larger pressure-bearing contact area. The 120mm deepened frame acts like a sturdy "load-bearing foundation," with built-in rubber seals enabling triple shock absorption and noise reduction. Luzhongbao's precision casting ensures millimeter-level accuracy between frame and grate, complemented by enhanced anti-corrosion surface treatment. It delivers zero-settlement, silent, and durable protection for high-load scenarios like urban main roads, expressways, and bus lanes.
