GRP Pultruded Profiles
High-performance structural shapes engineered to replace traditional steel, aluminum and timber in corrosive industrial environments — manufactured through a continuous pultrusion process.
Continuous Fiber-Reinforced Structural Shapes
GRP custom profiles are developed and produced according to customers' specific requirements. All GRP profiles are cross-reinforced with mats, with unidirectional glass fiber roving at the centre carrying longitudinal forces. Isophthalic polyester resin is used as standard, with other resin types available for special requirements. A surface veil can be applied to improve UV and wear protection.
Profile Shapes
Mechanical Properties
Published property ranges from Union Fiber's product literature. Values represent typical ranges for pultruded GRP profiles and should be confirmed against project-specific datasheets for critical structural design.
| Property | Value Range | Test Standard |
|---|---|---|
| Tensile strength | 280–400 MPa | ASTM D638 |
| Tensile modulus | 5–7 GPa | ASTM D638 |
| Flexural strength | 280–400 MPa | ASTM D790 |
| Flexural modulus | 7–10 GPa | ASTM D790 |
| Flexural E-modulus (full bending) | 23–28 GPa | ISO 14125 |
| Compressive strength | 210–280 MPa | ASTM D695 |
| Compressive modulus | 18–20 GPa | ASTM D695 |
| Interlaminar shear strength | 25–35 MPa | ASTM D2344 |
| Interlaminar shear modulus | 2–3 GPa | ASTM D2344 |
| Poisson's ratio | 0.3–0.4 | ASTM D3039 |
| Pin bearing strength | 70–150 MPa | ASTM D953 |
| Impact strength | >150 daN·cm/cm² | UNI 6062-67 |
Where GRP Profiles Are Used
- Structural frameworks
- Platforms, ladders and supports
- GRP handrails, walkways and platforms
- Industrial plants and water treatment facilities
- Offshore and marine projects
Frequently Asked Questions
We manufacture H-beams, I-beams, C-channels, square sections, rectangular sections, corrugated tubes, angles and fully custom shapes to customer specifications.
Isophthalic polyester resin is used as standard, with other resin types available for special requirements. A surface veil can be applied to improve UV and wear protection.
Published ranges include tensile strength of 280–400 MPa, flexural strength of 280–400 MPa, and compressive strength of 210–280 MPa. Full property ranges are listed above and should be confirmed against project-specific datasheets.
They are used in structural frameworks, platforms, ladders and supports, handrails and walkways, industrial plants, water treatment facilities, and offshore and marine projects.