A Comparison Between Duradek Pultruded Grating Vs Steel Grating

Strongwell produces DURADEK® by combining superior raw materials, pultrusion process, and composite design. DURADEK® is considered the highest quality pultruded fiberglass grating available on the market.

DURADEK® can be custom manufactured in special colors.

Figure 1. DURADEK® can be custom manufactured in special colors.

Properties and Key Features of DURADEK®

The DURADEK® has high ultimate strength, preventing impact damage. It also shows high corrosion resistance to most acids, salts, and caustics. It has a non-skid surface and low electrical conductivity, ensuring safety.

Other key features of the DURADEK® include:

  • Field fabricated easily
  • Versatile
  • Lightweight
  • Fire retardant – Meeting the self-extinguishing requirements of ASTM D-635 and the prerequisites of Class 1 rating of 25 or less per ASTM E-84
  • Contains UV inhibitors
  • Can be custom fabricated in special colors (Figure 1)

Duradek Pultruded Grating Vs Steel Grating

The following table compares Duradek® pultruded grating (Figure 2) against steel grating (Figure 3).

Duradek pultruded grating

Figure 2. Duradek pultruded grating

Steel grating

Figure 3. Steel grating

Features DURADEK® Pultruded Grating Steel Grating
STRENGTH DURADEK® I-6000, 1-1/2"
48" Span, Ultimate Load = 2032 PSF
DURADEK® has a higher ultimate load carrying capacity.
3/16" x 1-1/2" Bar, 1-3/16" o.c.
48" Span, Ultimate Load = 1,160 PSF
WEIGHT DURADEK® I-6000, 1-1/2" 3.3 PSF 3/16" x 1-1/2" Bar, 1-3/16" o.c. 11.0 PSF
IMPACT RESISTANCE Glass mat in DURADEK® grating distributes impact load to prevent surface damage even under sub-zero temperatures. Will not permanently deform.
Stays flat for the life of the product.
Will permanently deform under impact.
Takes a permanent set (dishing) in trench applications due to overloading.
CORROSION RESISTANCE DURADEK®, with its polyester resin, is resistant to corrosion caused by a broad range of acids, caustics and salts.
Requires no painting or galvanizing.
Will rust even from water. Can cause galvanic corrosion. Requires painting or galvanizing for many applications.
SAFETY DURADEK® has a round silica grit bonded to the surface of bearing bars for non-skid safety.
Low in electrical and thermal conductivity.
Non-serrated bars are not skid resistant or only skid resistant in one direction. Grounding potential around electrical equipment.
VERSATILITY DURADEK® can be purchased in a safety yellow or gray with the resin pigmented throughout the bar. No painting required. Grating must be painted for color. To maintain color and corrosion resistance, repainting may be required.
EASY FIELD FABRICATION DURADEK® can be field fabricated with simple carpenter tools, is easy to cut and is much easier to move and place because it is lightweight. Requires special blades, torch, harder to cut. Requires lifting equipment to move and place.
BANDING DURADEK® is an I-bar that does not leave a sharp edge when cut. The bars will not bend or deform in the lateral direction; therefore, DURADEK® does not need to be banded. Cutting a rectangular steel bar leaves sharp edges. The flat bars will bend and deform in the lateral direction; therefore, steel should be banded.

This information has been sourced, reviewed and adapted from materials provided by Strongwell Corporation.

For more information on this source, please visit Strongwell Corporation.

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