Why FRP Grating Is the Perfect Replacement for Galvanized Steel on Suspended Walkways

When it comes to rooftop safety and long-term durability, the material you choose for your suspended walkway matters. Recently, we received an inquiry from Kaiser Permanente regarding the feasibility of replacing galvanized steel grating with our FRP molded grating on a suspended walkway approximately 6 feet above a roof deck. In this article, we will explore the benefits of FRP (Fiber Reinforced Plastic) grating, compare it to galvanized steel, and explain why it's an excellent choice for elevated applications like rooftop walkways.

Understanding the Use Case: Suspended Walkways Over Roof Decks

Suspended walkways in healthcare or commercial buildings are used for safe access to mechanical equipment, HVAC systems, or rooftop maintenance areas. These walkways must be:

Lightweight yet structurally sound
Corrosion-resistant to withstand outdoor exposure
Non-conductive to enhance electrical safety
Slip-resistant to prevent workplace injuries

Galvanized steel has traditionally been used for such applications, but it's heavy, prone to corrosion over time, and can be difficult to install on rooftop structures without adding stress to the deck. This is where FRP grating offers a smarter solution.

⚖️ Weight Comparison: FRP Grating vs Galvanized Steel

One of the most important considerations for elevated platforms is the weight of the material. Here's a direct comparison:

Material	Approx. Weight (kg/m²)	Remarks
Galvanized Steel Grating	40 - 50	Heavy; requires structural reinforcement
FRP Molded Grating	12 - 20	Lightweight; ideal for suspended walkways

With a weight reduction of over 60%, FRP grating is significantly easier to handle, transport, and install - especially on fragile or weight-sensitive rooftop structures.

Corrosion Resistance and Long-Term Performance

Unlike galvanized steel that can rust or require re-coating in harsh environments, FRP grating is inherently corrosion-resistant. This makes it perfect for:

Rooftops exposed to rain, UV radiation, and temperature extremes
Healthcare environments requiring low maintenance and high safety
Seaside or coastal facilities prone to salt-laden air corrosion

Our gray FRP grating is manufactured using UV inhibitors and high-quality resin systems that ensure performance longevity with minimal degradation.

Mechanical Strength and Load Capacity

Despite its light weight, FRP grating offers excellent load-bearing capacity. For suspended walkways, we recommend a grating thickness of 38mm or 50mm, depending on the span and traffic type (foot traffic or equipment maintenance).

The panel can be supported by fiberglass or stainless steel supports, ensuring full compliance with safety standards.

Easy Installation with Less Structural Load

Another key advantage of FRP grating is that it doesn't require welding, heavy lifting equipment, or complex installation. Most panels can be cut on-site using standard diamond-tipped tools and fixed with corrosion-resistant clamps.

For a suspended walkway 6 feet above a roof deck - as requested by Kaiser Permanente - this means easier, faster, and safer installation without overloading the building's structural system.

Customization and Aesthetic Choices

We can provide gray FRP grating samples for architectural review. Our molded grating is available in a range of colors and resin systems to match your building's aesthetic and environmental requirements.

For example, gray is a popular choice for healthcare settings due to its neutral appearance and ability to reflect less heat.

Sustainability and Lifecycle Cost Savings

FRP grating contributes to lower lifecycle costs due to:

No repainting or recoating required
Lower installation and transportation costs
Longer life expectancy without structural compromise

This makes it an excellent long-term investment for hospitals, commercial rooftops, and industrial platforms alike.

Request a Sample or Quotation

If you're considering replacing galvanized steel with a smarter, lighter alternative, contact us today. We'd be happy to ship a gray FRP grating sample to:

Fred A Olaguez
1630 Newell Avenue
Walnut Creek, California 94596
USA

You can also explore our full range of FRP molded grating products online or consult with our technical team to customize a solution for your suspended walkway.