What is the Difference Between Surface Frame Manhole Covers and Recessed Frame Manhole Covers?

The Difference Between Above-Ground Frame Manhole Covers and Recessed Frame Manhole Covers

I. What are above-ground frame and recessed frame manhole covers?

• Above-Ground Frame Manhole Cover: This is a type of manhole cover where the frame section is positioned higher than the surrounding surface. It is usually installed on sidewalks or roads in urban areas. This cover is suitable for areas requiring high durability and aesthetic appeal, and it allows easy inspection and maintenance of the manhole.

• Recessed Frame Manhole Cover: This type of cover has its frame submerged beneath the concrete layer or road surface, suitable for high-traffic areas, ensuring a flat surface that does not obstruct vehicles passing over. It also has good anti-theft capabilities as the frame is embedded deep down.

II. Characteristics of above-ground frame and recessed frame manhole covers

• Characteristics of the above-ground frame manhole cover:

  • It has a square-edged design, and the patterns are often aesthetically pleasing.
  • Offers good load and stress resistance due to its integrated design.
  • The surface has square anti-slip blocks, increasing safety when driving or walking.

• Characteristics of the recessed frame manhole cover:

  • The frame section is placed beneath the concrete, helping to prevent theft effectively.
  • A rubber gasket is attached to help prevent odors effectively, protecting the surrounding environment.

III. Cost and suitable choice

• The price of above-ground frame and recessed frame manhole covers will depend on the material and size. Covers made of cast iron will be more expensive than those made of composite. Cast iron types are typically used in high-traffic areas, while composite is often chosen in areas with lower load requirements to save costs.

IV. Notes when choosing manhole covers

1. Based on usage needs: Choose the appropriate material such as cast iron, composite, or steel depending on the environment, load capacity, and nature of the area.
2. Research manhole cover types carefully: Choose products that match the project requirements regarding size, quantity, and cost to ensure effectiveness and safety.
3. Buy from a reputable supplier: Ensure product quality and good after-sales service from reputable suppliers in the market.

Hopefully, this article helps you better understand above-ground frame and recessed frame manhole covers and enables you to make the suitable choice for your construction project.