Fibergrate Composite Structures Blog

The Benefits of FRP Trench Drain Covers

Written by Fibergrate Marketing | Dec 11, 2024 8:47:33 PM

Trench drain covers are an important component in a wide range of industries, playing a role in managing water drainage, protecting cables and utilities, and ensuring pedestrian and vehicle safety. However, traditional trench drain covers made from materials like steel and cast iron can present significant challenges. These challenges can include:

  • Corrosion: Exposed to water, chemicals, and harsh weather conditions, traditional metal covers are susceptible to rust and corrosion. This can lead to structural weakening, safety hazards, and the need for frequent replacements. According to galvanizeit.org, “In North America the cost of pipeline corrosion is approximately $9 billion annually with 10% apportioned to cost of failure, 38% to capital requirements, and 52% to operations and maintenance.”
  • Heavy Weight: Steel and cast iron are heavy materials, making transportation, installation, and handling of trench drain covers a laborious and potentially costly task.
  • High Maintenance: Metal covers often require regular cleaning, painting, or repairs to maintain their structural integrity and appearance.

FRP Trench Drain Covers: A Durable and Versatile Alternative

Fiberglass reinforced plastic (FRP) trench drain covers offer a compelling alternative to traditional materials. FRP is a composite material that combines the strength and rigidity of fiberglass fibers with a durable resin matrix. This results in a lightweight yet incredibly strong and durable material that provides a wide range of benefits for trench drain applications.

Why Use Trench Covers Instead of Leaving Trenches Uncovered?

According to Gregory Moore, Fibergrate Territory Manager for North Carolina and Virginia, “What we recommend for grating depends on the application. In the data center sector, our clients typically like covered grating because of the deflection of the top because you have big trucks that are going to be driving over it. When you add FRP plate over the top of a grating, you can increase your deflection ratio by about 30%. So, your loading will change. Also, they don't want debris or other material to go into the conduit. It's the electrical wires that are going to be coming from the substation to the data center that run through the trench, and it’s important for those to be protected."

Gregory notes that the same set of decision making factors apply to other industries, including maritime applications.

"The projects I've done for shipyards have a similar kind of application and need similar access to the interior of the trench. They have a trench that runs down the whole pier and they have piping or electrical wires that will go all the way along the pier. It’s important for that to be covered so it doesn't deteriorate over time. The cover adds protection from the elements.”

Corrosion Resistance of FRP vs Traditional Materials

One of the most significant advantages of FRP trench drain covers is their exceptional resistance to corrosion. Unlike steel and cast iron, FRP is not susceptible to rust from exposure to water, salts, chemicals, and other corrosive elements. This translates to long-term durability, minimizing the risk of structural failures and ensuring the longevity of your trench drain system.

For instance, in applications like car washes, wastewater treatment facilities, or coastal environments, traditional metal covers corrode rapidly due to constant moisture and potential salt exposure. FRP trench drain covers, on the other hand, maintain their structural integrity and appearance in these challenging environments, significantly reducing the need for replacements and associated costs.

FRP Trench Drain Covers are Lightweight & Easy to Install

Another key benefit of FRP trench drain covers is their lightweight design. Compared to their heavy metal counterparts, FRP covers are significantly lighter, simplifying transportation, installation, and handling. This translates to:

  • Reduced Labor Costs: Lighter weight makes it easier for crews to maneuver and install trench drain covers, potentially saving time and labor costs. Steel is four times more dense than FRP, and steel gratings can be two to two-and-a-half times heavier than FRP gratings. This is especially important in use cases where installations are temporary or are frequently moved, such as such as construction sites, industrial facilities, and temporary event spaces.
  • Improved Efficiency: Faster installation means less downtime for construction or maintenance projects.  
  • Versatility: The lighter weight makes FRP trench drain covers suitable for a wider range of applications, including areas with weight restrictions or limited access. 

In-House Expertise at Fibergrate

At Fibergrate, we understand the importance of a smooth and efficient installation process. That is why we offer a range of FRP trench drain cover materials in various sizes and load capacities, allowing for precise project specifications. This includes covered grating, and molded and pultruded grating. Additionally, Fibergrate's team of expert in-house engineers can provide valuable assistance with custom design and certification drawings, ensuring your trench drain system meets all necessary requirements.

FRP Trench Drain Covers Offer High Strength to Weight Ratio

Despite their lightweight design, FRP trench drain covers possess exceptional strength and load-bearing capacity. The advanced composite structure of FRP can be engineered to handle a wide range of weight requirements, making them suitable for various applications. These include:

  • Installation in Pedestrian Traffic Areas: FRP trench drain covers can safely accommodate foot traffic in areas like sidewalks, walkways, or plazas.
  • Installation in Vehicular Traffic Areas: High-strength FRP covers can be designed to support vehicular loads in areas like parking lots, driveways, or industrial facilities. This strength is achieved while being less than half the weight of steel.
  • Heavy Equipment Access: For facilities requiring access to heavy machinery, Fibergrate offers FRP trench drain covers specifically designed to handle significant loads. For more on FRP’s suitability for handling heavy loads, read Fibergrate’s case study on installation of Utility Trench Covers for a  Water Treatment Plant in Dallas. FRP grating is also highly impact-resistant, check out our drop test to get an idea of how FRP's impact resistance stacks up against steel's.

By choosing FRP trench drain covers, you ensure the system can withstand the anticipated loads without compromising safety or functionality.

Safety First: Slip-Resistant FRP Composite Trench Drain Covers

Traditional metal trench drain covers, when wet or contaminated, can become slippery and pose a significant safety hazard, increasing the risk of accidents and injuries.

FRP trench grate covers offer a superior solution by incorporating slip-resistant surfaces. These textured surfaces provide excellent traction even in challenging conditions, such as wet environments, oil spills, or debris accumulation. This significantly reduces the risk of slips and falls, protecting workers and visitors.

Key Safety Benefits of FRP Trench Grate Covers:

  • Enhanced Traction: Slip-resistant surfaces provide superior grip, even in wet or contaminated conditions.
  • Reduced Fall Risk: Minimize the likelihood of accidents and injuries caused by slips and falls.
  • Improved Safety for Pedestrians: Protect workers, visitors, and the general public from safety hazards.
  • Compliance with Regulations: FRP trench grate covers with slip-resistant surfaces can help meet safety regulations and industry standards.

Long Lifespan of Trench Drains: Plastic Composites Outshine Other Materials

Traditional metal trench drain covers often require regular maintenance, including cleaning, painting, or repairs to maintain their integrity and aesthetics. In contrast, FRP trench drain covers are very low on maintenance. Their non-corrosive properties minimize cleaning needs, and their durable construction eliminates the need for frequent repainting. This translates to significant cost savings over the lifespan of the trench drain system.

For example, in a commercial kitchen or food processing facility, frequent cleaning and sanitation processes pose challenges for maintaining traditional metal trench drain covers.

Trench Drain Covers by Fibergrate

By choosing FRP trench drain covers, you can significantly enhance the safety, durability, and efficiency of your infrastructure. FRP offers a compelling alternative to traditional materials, providing a lightweight, corrosion-resistant, and long-lasting solution.

Fibergrate is a leading manufacturer of FRP products for indoor and outdoor applications, offering a wide range of products to meet your specific needs. Our in-house engineering team can provide expert guidance and support to help with designing FRP solutions for custom drainage projects.

Contact Fibergrate today to learn more about how our products can benefit your project.

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