Have you ever seen a round or square cover on the street, sidewalk, or yard? That is called a manhole cover. Its function is very important to protect an access hole leading to an underground facility such as a water pipe, electrical cable, or drainage system, ensuring safety for both pedestrians and vehicles.

What Is an FRP Manhole?

An FRP manhole is an access hole cover made of Fiberglass Reinforced Plastic or a composite material such as BMC (Bulk Molding Compound). This material combines glass fiber and plastic resin, resulting in a cover that is strong, lightweight, corrosion-resistant, and non-conductive.
Unlike a traditional manhole made of cast iron or concrete, an FRP manhole is lighter in weight yet capable of withstanding heavy loads.

Uses of a Manhole Cover

A manhole cover is installed in various locations to protect and facilitate access for the maintenance of underground infrastructure, such as:

• Drainage system: to inspect and clean a rainwater or wastewater channel.

• Electrical and telecommunication network: to access an underground cable.

• Piping system: such as a clean water or gas pipe.

• Inspection access: in an industrial area, port, or public facility.

Advantages of an FRP Manhole Compared to Other Materials

Based on data, an FRP or BMC manhole has several advantages over cast iron and concrete:

• Lightweight yet strong: easy to install without heavy equipment, but still able to withstand a high load.

• Corrosion and rust resistant: ideal for a humid environment or near the sea.

• Safe: non-conductive, minimizing the risk of electric shock.

• Various designs: available in round and square shapes, with colors such as black, light gray, yellow, or green.

• Competitive price: offering greater value with a long service life.

Shapes and Variants of an FRP Manhole

• BMC Rounded (Round): Diameter ±800 mm, thickness 60 mm, weight ±42 kg.
• BMC Square (Square): Dimension varies, for example 600×600 mm, weight starting from 15 kg.
  Both can be customized to project needs and are equipped with a strong supporting ring.

An FRP manhole is a modern solution for an access hole cover that prioritizes safety, durability, and easy installation. With various shape, color, and load class options, an FRP manhole is suitable for a residential area, public facility, and even an industrial site.