FRP I-Beam Profiles
Wide flange pultruded FRP I-beams from 76×38 mm to 305×305 mm. Up to 75% weight reduction versus steel with full corrosion resistance.
Structural I-beams engineered for performance
Our pultruded FRP I-beams replicate standard steel wide-flange geometry while delivering up to 75% weight reduction. Unidirectional E-glass roving in the flanges provides maximum flexural stiffness, combined with continuous strand mat in the web for shear resistance. Available in polyester, vinyl ester, phenolic, and epoxy resin systems.
Available sizes
All dimensions in millimeters. Custom sizes available via our custom pultrusion service.
| Model | H (mm) | B (mm) | tw (mm) | tf (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| I 76×38×6.4 | 76 | 38 | 6.4 | 6.4 | 1.2 |
| I 100×50×6 | 100 | 50 | 6 | 6 | 1.6 |
| I 120×60×6 | 120 | 60 | 6 | 6 | 2.0 |
| I 152×76×6.4 | 152 | 76 | 6.4 | 6.4 | 2.9 |
| I 160×80×8 | 160 | 80 | 8 | 8 | 3.6 |
| I 200×100×10 | 200 | 100 | 10 | 10 | 5.8 |
| I 240×120×12 | 240 | 120 | 12 | 12 | 8.4 |
| I 300×150×15 | 300 | 150 | 15 | 15 | 13.5 |
| I 305×305×12.7 | 305 | 305 | 12.7 | 12.7 | 16.0 |
Wall thicknesses and weights are typical values for E-glass/polyester. Actual values may vary by resin system and fiber architecture.
Frequently Asked Questions
How much lighter are FRP I-beams compared to steel?
Pultruded FRP I-beams weigh approximately 75% less than equivalent steel wide-flange sections. For example, an FRP I 200×100×10 weighs roughly 5.8 kg/m compared to approximately 25 kg/m for a comparable steel section. This dramatically reduces lifting requirements and foundation loads.
What resin systems are available for I-beams?
We offer I-beams in isophthalic polyester for general structural use, vinyl ester for aggressive chemical or marine environments, phenolic for fire performance (low smoke, low toxicity), and epoxy on request for maximum mechanical performance.
Can FRP I-beams be used as primary structural members?
Yes. FRP I-beams are widely used as primary structural members for walkways, bridges, platforms, and building frames. The elastic modulus of FRP is approximately 1/5th that of steel, so deflection often governs design rather than strength. We provide full engineering data and can assist with span table calculations.
Need engineering data or a quotation for I-beam profiles?
Our engineering team is ready to help you find the right FRP solution. Get in touch for technical consultation or a detailed quotation.