FRP I beams — also called fiberglass I beams or FRP H beams — are pultruded structural profiles widely used in industrial platforms, chemical plants, offshore structures, and infrastructure projects. Compared to steel I beams, they offer excellent corrosion resistance, light weight, and a long service life.
To verify mechanical performance, we had an independent third-party lab — Intertek Shanghai — run tests in accordance with ASTM standards. Below is a summary of the verified results and what they mean structurally.
Test Information
| Item | Details |
|---|---|
| Product Name | FRP I Beam / Fiberglass H Beam |
| Section Size | 152 × 152 × 9.5 mm |
| Testing Laboratory | Intertek Shanghai (CMA & CNAS Accredited) |
| Report Number | 201016012SHF-005 |
| Test Standards | ASTM D638, ASTM D695, ASTM D790 |
All samples were conditioned under controlled temperature and humidity before testing, to ensure accurate, repeatable results.
Tensile Properties
Tensile performance is a key indicator for load-bearing structural profiles. Testing followed ASTM D638-14 in the longitudinal direction.
| Tensile Property | Result |
|---|---|
| Tensile Strength | 352 MPa |
| Tensile Modulus | 23.5 GPa |
| Elongation at Break | 1.6% |
These results show pultruded FRP I beams deliver high axial strength and stiffness while staying significantly lighter than steel beams.
Compression Performance
Compression resistance matters most for columns, supports, and vertical members. Testing followed ASTM D695-15.
| Compression Property | Result |
|---|---|
| Compressive Strength | 134 MPa |
| Compressive Modulus | 23.6 GPa |
A stable compressive modulus means reliable load transfer and structural safety, especially in corrosive or high-humidity environments.
Flexural Properties (Bending Performance)
Flexural performance determines how well a beam resists bending under service loads. Testing followed ASTM D790-17 (Procedure A).
| Flexural Property | Result |
|---|---|
| Flexural Strength | 408 MPa |
| Flexural Modulus | 20.5 GPa |
| Test Span | 152 mm |
That high flexural strength makes FRP I beams a strong fit for walkways, platforms, cable trays, bridges, and structural framing systems.
FRP I Beam vs. Steel I Beam
| Comparison Item | FRP I Beam | Steel I Beam |
|---|---|---|
| Corrosion Resistance | Excellent | Poor (requires coating) |
| Weight | Lightweight | Heavy |
| Maintenance | Low | High |
| Electrical Insulation | Yes | No |
FRP H Beam
Custom FRP I Beam Solutions
We provide customized FRP I beam solutions for different project requirements, including:
- Custom cross-section sizes and fiber volume ratios
- Different resin systems (polyester, vinyl ester, epoxy)
- FRP pultrusion molds and complete production lines
- Technical support for engineering and structural applications
Get a Quote
Looking for tested, reliable FRP I beams for your project? Contact us:
Website: frphk.co
Email: helena@frphk.co
WhatsApp: +86 153 0373 5673
We help global customers replace steel with advanced FRP structural solutions.
FRP I Beam Resource Hub