LuZhongBao 300×300 recessed manhole cover is a precision engineering product specifically designed for venues requiring extremely high ground flatness. Manufactured from QT500-7 high-strength ductile iron and strictly compliant with GB/T 23858 national standards, its 300mm×300mm square size perfectly adapts to various small inspection manholes. The unique recessed design allows the cover to be filled with asphalt, concrete, or flooring materials after installation, achieving complete flushness with the surrounding ground and thoroughly eliminating tripping hazards. This design is particularly suitable for airport terminals, high-end commercial plazas, pedestrian walkways, and other venues demanding exceptional ground flatness and aesthetics, providing reliable manhole protection while maximizing ground continuity and visual integrity.
The product surface undergoes special treatment to provide excellent adhesion, ensuring firm bonding of filling materials. Dedicated fixing holes around the cover support multiple installation methods. With precision manufacturing, LuZhongBao ensures perfect integration between the cover and filling materials, balancing functionality and Barrier-free ground access, demonstrating perfect harmony between utility and aesthetics.
