Pultruded vs. Molded FRP Grating: Which One Should You Choose?

Published: July 2025 | Product Guide | Author: Preet Technical Team

1. What Is Pultruded FRP Grating?

Pultruded FRP grating is made by pulling continuous fiberglass strands through a resin bath and heated die. This creates a strong, linear structure with high unidirectional strength.

It's ideal for applications requiring long spans, high load capacity, and directional strength-like industrial platforms, walkways, and catwalks.

Learn more on our FRP pultruded grating product page.

2. What Is Molded FRP Grating?

Molded FRP grating is manufactured by placing chopped fiberglass strands into a mold and saturating them with resin. It forms a mesh-like panel with equal strength in both directions (bi-directional).

Molded grating is often used in floor drains, trench covers, or corrosive environments where maximum open area and chemical resistance are needed.

Explore our molded grating options here.

3. Key Differences Between Pultruded and Molded FRP Grating

Feature	Pultruded Grating	Molded Grating
Manufacturing Process	Pultrusion (continuous strands)	Molding (chopped strand)
Load Capacity	High (directional)	Moderate (equal in all directions)
Span Capability	Long spans possible	Limited span
Slip Resistance	Gritted surface available	Typically molded-in grit
Cost	Higher (per strength)	Lower
Ideal Use	Walkways, platforms, catwalks	Drains, trench covers, corrosion zones

4. Which Type Should You Use?

Use pultruded grating when your project requires:

✔ Long unsupported spans
✔ Heavy equipment traffic
✔ Directional load support

Use molded grating when you need:

✔ High corrosion resistance
✔ Lower cost for non-structural use
✔ Drainage applications

Still Not Sure? Ask Our Experts

Our team at Preet can help you select the best fiberglass grating for your industry. Whether it's chemical processing, oil & gas, marine, or construction-we'll guide you from spec to shipment.

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📧 Email: info@preet.cn
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