What is Pultruded FRP Grating?

Pultruded FRP grating is a type of fiberglass reinforced plastic grating manufactured using the pultrusion process. Unlike molded FRP grating, which is formed in a mold, pultruded grating consists of continuous fiberglass rovings and mats pulled through a heated die, resulting in strong load-bearing bars bonded together with cross rods. This makes pultruded grating an excellent choice for heavy-duty applications where high strength and durability are required.

How Pultruded FRP Grating is Made

The pultrusion process gives FRP grating unique structural advantages:

Reinforcement Fibers: Continuous fiberglass strands provide the core strength.
Resin System: Polyester, vinyl ester, or epoxy resin bonds the fibers, adding corrosion resistance.
Pultrusion Die: Materials are pulled through a heated die to cure and form the load bars.
Assembly: Cross rods are inserted mechanically or adhesively to connect the load bars.

Pultruded FRP grating structure with load bars and cross rods

Pultruded FRP grating has continuous load bars for superior strength.

Advantages of Pultruded FRP Grating

High Load Capacity: Ideal for areas with heavy equipment, vehicle traffic, or industrial platforms.
Corrosion Resistance: Performs well in chemical plants, offshore platforms, and wastewater treatment facilities.
Lightweight Yet Durable: Easier to handle than steel grating, but with long-term strength.
Slip Resistance: Anti-skid surface ensures worker safety in wet or oily environments.
Long Service Life: Typically 20–30 years with minimal maintenance required.

Pultruded FRP vs. Molded FRP Grating

Although both are fiberglass reinforced gratings, their properties differ:

Pultruded FRP Grating: Higher strength, suitable for heavy loads, linear bar structure.
Molded FRP Grating: Isotropic strength, better for corrosion resistance in medium-duty applications.

Many industries choose pultruded FRP grating when structural strength is the top priority.