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Types of FRP Grating | Grating Manufacturer | Origa Mulia FRP
HI-GRID
Sep 19, 2025
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FRP grating (Fiberglass Reinforced Plastic grating) is a grid-shaped material made from a combination of fiberglass and plastic resin. In addition to being strong and lightweight, FRP grating is also corrosion-resistant, has anti-slip properties, and is suitable for use in various environments, from industrial to residential.

Interestingly, FRP grating has several types distinguished by the type of resin and its resistance capabilities. Here are the explanations of the commonly used FRP grating types.

1. Superior Grade


Resin Base: Vinylester
Description: This type of FRP grating has very high corrosion resistance, UV protection, and fire resistance.
Corrosion Resistance: Excellent
Flame Spread Rating ASTM E84: Class A, FSI ≤ 0–25, SDR: Maximum 450
Maximum Operating Temperature: 230°F / 110°C
Usage: Suitable for environments with exposure to aggressive chemicals or outdoor areas exposed to extreme weather.

2. Industrial Grade

Resin Base: Isophthalic Polyester
Description: Has industrial-level corrosion resistance, UV protection, and fire resistance.
Corrosion Resistance: Very Good
Flame Spread Rating ASTM E84: Class A, FSI ≤ 0–25, SDR: Maximum 450
Maximum Operating Temperature: 212°F / 100°C
Usage: Ideal for factory areas, pedestrian walkways in industrial areas, or environments with moderate chemical exposure.

3. Food Grade

Resin Base: Isophthalic Polyester
Description: Specially designed with food-grade properties, meaning it is safe for use in food processing environments.
Corrosion Resistance: Very Good
Maximum Operating Temperature: 212°F / 100°C
Usage: Suitable for industrial kitchens, food and beverage production areas, and food storage facilities.

4. Commercial Grade

Resin Base: Orthophthalic
Description: Has adequate corrosion resistance and UV protection, with a focus on general use.
Corrosion Resistance: Moderate
Flame Spread Rating ASTM E84: Class C, FSI 76–200, SDR: Maximum 450
Maximum Operating Temperature: 194°F / 90°C
Usage: Suitable for light to medium applications, such as public walkways, outdoor stairs, or commercial facilities.

Choosing the right type of FRP grating is very important so that the material can perform optimally according to the needs.

  • Use Superior Grade for maximum resistance to corrosion and extreme weather.

  • Choose Industrial Grade for industrial areas with moderate chemical exposure.

  • Use Food Grade for food processing environments.

  • Choose Commercial Grade for general use with light to medium loads.

By understanding these differences, users can adjust the choice of FRP grating according to technical requirements and installation environments.