ISO 9001/10002/14001/45001 Certified
Fiberglass-Reinforced Polymer Strut Channel
FiberrStrut™ is Fiberr USA’s fiberglass-reinforced plastic (FRP) alternative to traditional steel electrical strut systems. Manufactured using advanced pultrusion technology, it provides high strength, low weight, and excellent resistance to corrosion, chemicals, and moisture.
Unlike steel, FiberrStrut™ is nonconductive, spark-free, and will not rust, making it well suited for harsh, outdoor, corrosive, and electrically sensitive environments. It is compatible with standard Unistrut-type hardware.
Immune to rust and resistant to moisture, salts, and many industrial chemicals.
Approximately 30% to 40% of the weight of steel for easier handling and installation.
Provides electrical isolation and does not require grounding like conductive steel strut.
Designed for use with standard Unistrut-type channel hardware and accessories.
FiberrStrut™ provides the versatility of traditional steel strut while offering performance and lifecycle advantages in corrosive, wet, coastal, outdoor, and electrically sensitive environments.
The pultruded FRP construction combines continuous fiberglass reinforcement with a polymer resin matrix to produce a strong, dimensionally consistent structural profile.
FiberrStrut™ is substantially lighter than steel strut, reducing the effort required for lifting, positioning, cutting, and overhead installation.
The channel can be cut and drilled with standard tools. Because it is nonmetallic, routine fabrication does not create sparks and generally does not require the hot-work procedures associated with cutting steel.
Its low thermal conductivity also reduces heat transfer and thermal bridging in comparison with steel support systems.
FiberrStrut™ is intended for structural support applications where corrosion resistance, electrical nonconductivity, low weight, and long service life are important.
Support framing for electrical conduit, cable trays, instrumentation, controls, and communications systems.
Structural support for process piping, water lines, utility piping, and other mechanical systems.
Support framing for ducts, equipment, piping, and mechanical components.
Corrosion-resistant framing for treatment plants, pump stations, filtration systems, and wet environments.
Nonrusting support systems for facilities exposed to moisture, salts, fumes, and industrial chemicals.
Structural support for applications exposed to salt air, seawater, humidity, and severe coastal conditions.
Nonconductive and nonmagnetic support framing for electrical, instrumentation, and mechanical systems.
Corrosion-resistant framing for wet processing, washdown, and sanitation-sensitive environments.
Lightweight, nonmagnetic support framing for electrical distribution, cable management, and mechanical infrastructure.
FiberrStrut™ does not conduct electricity and does not require grounding in the manner of a conductive steel support system.
Its nonmagnetic construction avoids interaction with magnetic fields and electromagnetic equipment. These characteristics make it suitable for data centers, power facilities, communications infrastructure, laboratories, and other electrically sensitive installations.
FiberrStrut™ provides the functional versatility of traditional steel strut with material characteristics intended to reduce corrosion, installation effort, maintenance, and lifecycle replacement costs.
| Feature or Property | FiberrStrut™ FRP Strut | Steel Strut |
|---|---|---|
| Corrosion Resistance | Excellent. Immune to rust and resistant to salts, moisture, and many chemicals. | Relies on galvanizing or protective coatings. Corrosion can progress in wet, coastal, or chemically aggressive settings. |
| Weight | Lightweight, approximately 30% to 40% of the weight of steel. | Heavy, increasing lifting effort, labor requirements, and shipping cost. |
| Tensile Strength | 35,000 psi axially. | Approximately 33,000 psi for Grade 33 steel. |
| Modulus of Elasticity | 3.335 × 106 psi axially. | Approximately 29 × 106 psi. |
| Flexural Strength | 35,000 psi axially. | Allowable flexural stress of approximately 22,000 to 25,000 psi. |
| Strength-to-Weight Ratio | High structural efficiency while maintaining low weight. | High strength, but greater weight affects handling and installation. |
| Electrical Conductivity | Nonconductive. No grounding required. | Conductive. Grounding is required. |
| Dielectric Strength | 246.3 kV/in axially. | None. Steel conducts electricity. |
| Thermal Conductivity | Low, approximately 0.04 W/m·K, reducing thermal bridging. | High, approximately 45 to 60 W/m·K. |
| Fire Resistance | Fire-retardant resin construction; ASTM E84 Class 1. | Noncombustible. |
| UV and Weathering | Stable for long-term outdoor service. | Coatings can chalk, rust, or degrade. |
| Magnetic Properties | Nonmagnetic, with no magnetic-field interaction. | Magnetic and potentially unsuitable near sensitive equipment. |
| Installation | Lightweight and readily cut or drilled with standard tools. No hot work is ordinarily required. | Heavier and more difficult to handle. Cutting can require hot-work controls. |
| Safety | Spark-free, nonconductive, and characterized by low heat transfer. | Conductive, magnetic, and characterized by high heat transfer. |
| Maintenance | Low maintenance with long service life. | Coating maintenance and corrosion repairs may be required. |
| Lifecycle Cost | Reduced installation labor, maintenance, and corrosion-driven replacement. | Higher ongoing maintenance and replacement exposure in corrosive environments. |
Standard slotted and round-hole configurations are based on a nominal 1-5/8-inch channel width and are intended for compatibility with common strut-channel hardware.
| Channel Size (Nominal Width) |
Slot or Hole Dimensions (Width × Length) |
Spacing (Center-to-Center) |
First Slot or Hole Center from End |
Notes |
|---|---|---|---|---|
| 1-5/8 in. | 9/16 × 1-1/8 in. slots | 2 in. | 13/16 in. | Common longitudinal Unistrut-type slot configuration. |
| 1-5/8 in. | 9/16 in. round holes | 2 in. | 13/16 in. | Same nominal channel size with round holes instead of slots. |
The following technical data reflects Fiberr USA pultruded properties tested in accordance with the listed ASTM standards and represents the material performance characteristics of the FRP strut system.
| Property | Standard | Imperial | Metric |
|---|---|---|---|
| Tensile Strength, Axial | ASTM D638 | 35 ksi | 240 MPa |
| Tensile Strength, Transverse | ASTM D638 | 7.25 ksi | 50 MPa |
| Tension Modulus, Axial | ASTM D638 | 3,335 ksi | 23 GPa |
| Tension Modulus, Transverse | ASTM D638 | 1,015 ksi | 7 GPa |
| Compressive Strength, Axial | ASTM D695 | 46 ksi | 320 MPa |
| Compressive Strength, Transverse | ASTM D695 | 16 ksi | 112 MPa |
| Compressive Modulus, Axial | ASTM D695 | 2,625 ksi | 18.1 GPa |
| Compressive Modulus, Transverse | ASTM D695 | 1,030 ksi | 7.1 GPa |
| Compressive Shear Stress | ASTM D3846 | 38 ksi | 26 MPa |
| Modulus of Elasticity, Young’s Modulus | ASTM D638 | 3,335 ksi | 23 GPa |
| Bearing Stress, Axial | ASTM D953 | 44 ksi | 305 MPa |
| Bearing Stress, Transverse | ASTM D953 | 38 ksi | 265 MPa |
| Pin Bearing Strength, Axial | ASTM D953 | 22 ksi | 150 MPa |
| Pin Bearing Strength, Transverse | ASTM D953 | 10 ksi | 70 MPa |
| Flexural Strength, Axial | ASTM D790 | 35 ksi | 240 MPa |
| Flexural Strength, Transverse | ASTM D790 | 15 ksi | 100 MPa |
| Flexural Modulus, Axial | ASTM D790 | 3,408 ksi | 23.5 GPa |
| Flexural Modulus, Transverse | ASTM D790 | 1,073 ksi | 7.4 GPa |
| Interlaminar Shear Strength | ASTM D2344 | 4 ksi | 25 MPa |
| 24-Hour Water Absorption | ASTM D570 | 0.3% | 0.3% |
| Notched Izod Impact | ASTM D256 | — | 1.4 m-kg/cm |
| Property | Standard | Imperial | Metric |
|---|---|---|---|
| Specific Insulation Resistance | ASTM D257 | — | 1010 to 1015 Ω/cm |
| Surface Resistance | ASTM D257 | — | 1010 to 1015 Ω |
| Dielectric Constant | ASTM D150 | — | ≤ 5 |
| Dissipation Factor | ASTM D150 | — | 0.01 |
| Breakdown Voltage | ASTM D149 | — | 18 kV |
| Dielectric Strength, Axial | ASTM D149 | 246.3 kV/in. | 9.71 kV/mm |
| Dielectric Strength, Transverse | ASTM D149 | 264.5 kV/in. | 10.43 kV/mm |
Technical values represent pultruded material properties. Product-specific structural capacity depends on profile geometry, span, loading, support conditions, connections, environmental exposure, and the applicable design criteria.
Contact Fiberr USA for product selection, technical information, availability, samples, custom requirements, and project pricing.
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