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DURADEK® (Pultruded Fiberglass Grating)

Duradek high strength fiberglass grating is a pultruded bar type grating that can be designed and used like traditional metal grates. The individual bearing bars are either 1" or 1-1/2" "I" shapes or a 2" "T" shape.

Duradek is also a flame retardant product utilizing a premium grade vinyl ester resin. The bearing bars use both longitudinal (glass roving) and multidirectional (glass mat) reinforcements as well as a synthetic surfacing veil to provide unequaled corrosion resistance. Duradek is a standard product in stock at Alro Plastics.

Fabricating with Duradek

Duradek is lightweight and, therefore, easily handled in installation, and costs less to ship than steel grating. A patented 3-piece cross-rod system both mechanically locks and chemically bonds the cross rods to the web of each bearing bar. This separates and affixes bearing bars firmly in position and distributes concentrated loads to adjacent bars. The system allows Duradek grating to be cut and fabricated like a solid sheet.

Product Features

Duradek fiberglass grating has had a dramatic effect on the way plant engineers view corrosion problems in industrial environments because Duradek is an ideal replacement for steel or aluminum gratings in these environments. Long life, inherent in fiberglass (often outlasts steel 20-to-1), makes Duradek a problem solving material where frequent grating and walkway replacement costs are unacceptable. Duradek has these features:

  • Corrosion resistant
  • Structurally strong
  • High impact strength
  • High fatigue strength
  • Lightweight
  • Non-conductive
  • Resistant to chipping and cracking
  • Aesthetically pleasing appearance
  • Anti-skid Rigid
  • Easy to fabricate
  • Low maintenance
  • Low thermal conductivity
  • Non-sparking

Duradek is lightweight and therefore easily handled in installation and costs less to ship than steel grating. Furthermore, because of the unique cross-bar construction, Duradek grating panels can be easily modified to fit almost any plant requirement.

All of these factors add up to low installation costs and are another reason for the increasing popularity of Duradek. Whether you are designing, building, or replacing walkways or platforms, make Duradek your choice for long-lasting dependable service.


Duradek High Strength Grating is designed to be used as walkways, platforms, and decking in a wide variety of applications:

  • General Industry
  • Chemical/Petrochemical Plants
  • Railroad - AAA Approval
  • Pulp and Paper Plants
  • Food & Beverage Operations
  • Water/Waste Treatment Plants
  • Plating Operations
  • Mass Transit Systems
  • Power Plants
  • Fire Equipment
  • Marine Mining

Resin & Colors

Duradek's Fire Retardant Vinyl Ester resin, manufactured from a premium grade vinyl ester resin with antimony trioxide added, exceeds the requirements for Class 1 rating of 25 or less per ASTM E-84 and meets self-extinguishing requirements of ASTM D-635. Ideal for severe corrosion applications, vinyl ester has better resistance to caustic and certain acid environments than polyester resins and can be used for most applications. Ask for the Strongwell Corrosion Resistance Guide for more information.

Anti-Skid Surface

The top of Duradek grating is covered with a permanently bonded grit baked epoxy, anti-skid surface with optional grit material and particle sizes available.

Shapes, Sizes, & Availability

Duradek is available in three shapes and sizes:

  • 1" deep I-bar
  • 1-1/2" deep I-bar
  • 2" deep T-bar

These shapes are assembled into 12 panel sizes for your convenience.; 3-, 4-, and 5-foot widths in each of 8-, 10-, 12-, and 20-foot lengths. Standard panels come with cross-rod spacings of 6" or optional 12" on center. Yellow and gray vinyl ester panels with cross-rods at 6" center can be shipped from the factory within 72 hours. Alro Plastics has many popular sizes in stock and we can cut and/or ship most requirements the same day.


A complete line of accessories are available for installing Duradek including stair treads and landings, panel hold-downs, panel connectors and curb angle.

Click here to read the complete Duradek brochure on-line with Adobe Acrobat Reader.

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