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Structural Plates & Shapes
Gritted Plate
Handrail Systems
Structural Building Panels
Studs & Nuts
Ladders & Cages
Ladders & Cages

EXTREN® photo of different sizes and shapes


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EXTREN® is a proprietary combination of fiberglass reinforcements and thermosetting polyester or vinyl ester resin systems.

EXTREN® is produced in more than 100 standard shapes and all shapes have a surface veil to protect against glass fibers penetrating the resin surface in service and to increase corrosion and UV resistance.

EXTREN® is offered in three series designed for different environments and applications.

Series 500

An all-purpose series utilizing an isophthalic polyester resin system with a UV inhibitor. Color: Olive Green

Series 525

An all-purpose series utilizing a fire retardant isophthalic polyester resin system with a UV inhibitor. Color: Slate Gray (plus certain handrail and fixed ladder components in yellow)

Series 625

A premium series both fire retardant and highly corrosion resistant utilizing a vinyl ester resin system with a UV inhibitor. Color: Beige

Series 500 beams
Extren® beams in rootop installation.

Features of EXTREN®

  • Corrosion Resistant
  • Low Conductivity - Thermally and Electrically
  • Non-Magnetic - Electromagnetic Transparency
  • Lightweight
  • High Strength
  • Dimensional Stability
  • Low Maintenance

EXTREN® Product Logo

EXTREN® fiberglass structural shapes and plate have been imprinted with the EXTREN® logoA product logo identification program was implemented by Strongwell after designers and specifiers of EXTREN® learned that problems were occurring because sellers or contractors were substituting look-alike shapes.

Since July 1, 1993, all EXTREN® fiberglass structural shapes and plate have been imprinted with the EXTREN® logo every three feet down the length of the part. Square and round tubes have the logo imprinted inside the shape. Small and unobtrusive, the logo assures customers that they are getting EXTREN® properties backed up by corrosion, mechanical and structural testing as conducted by Strongwell.

Quality and Availability

EXTREN® structural shapes in stocked warehouse.

Strongwell manufacturing facilities are ISO-9001:2000 certified. This ensures the highest quality standards for producing EXTREN® structural shapes in a world class facility. A "first article" series of tests on each EXTREN® production run is designed to assure the end user that the structural members meet or exceed published minimum criteria.

EXTREN® is stocked by a network of distributors worldwide. Strongwell also maintains a large inventory to service distributors and prevent long lead times. The current EXTREN® products are shown on the EXTREN® Availability List.

EXTREN® beams and columns

Fabricating with EXTREN ®

In addition to being the world's largest producer of pultruded parts, Strongwell is also the largest fabricator of structures utilizing pultruded components. Typical fabrications include beam, column and plate structures, all-fiberglass buildings, platforms and other custom fabrications involving grating and handrail.

Quality Flexibility Responsiveness Convenience Value Service