FRP technical data — material properties & specifications
Published mechanical and physical properties for the standard pultruded E-glass profile laminate, with grade minimums, test methods, and guidance for using the data in member design.
E23 mechanical and physical properties
Read this data as material characterization, not as a member capacity table. Pultruded profiles are anisotropic: longitudinal values are dominated by continuous rovings, while transverse and connection behavior depend more on mats, resin, geometry, holes and load direction. Final design combines these properties with section data, exposure and duration factors, connection checks and the governing project code.
EN 13706 sets the grade requirements; the referenced EN ISO methods define how each coupon property is measured. The published column is the standard laminate data used across F1 datasheets; the minimum column shows the E23 threshold beside it rather than mixing the two.
| Property | Published value | EN 13706 E23 minimum | Test method |
|---|---|---|---|
| Tensile modulus (longitudinal) | 23 GPa | 23 GPa | EN ISO 527-4 |
| Tensile modulus (transverse) | 7 GPa | 7 GPa | EN ISO 527-4 |
| Tensile strength (longitudinal) | 240 MPa | 240 MPa | EN ISO 527-4 |
| Tensile strength (transverse) | 50 MPa | 50 MPa | EN ISO 527-4 |
| Flexural strength (longitudinal) | 240 MPa | 240 MPa | EN ISO 14125 |
| Flexural strength (transverse) | 100 MPa | 100 MPa | EN ISO 14125 |
| Interlaminar shear strength (ILSS) | 30 MPa | 25 MPa | EN ISO 14130 |
| Pin-bearing strength (longitudinal) | 150 MPa | 150 MPa | EN 13706-2 Annex E |
| Pin-bearing strength (transverse) | 70 MPa | 70 MPa | EN 13706-2 Annex E |
| Compressive strength (longitudinal) | 240 MPa | Not specified | EN ISO 604 |
| Barcol hardness | 45 | Not specified | ASTM D2583 |
| Water absorption (24 h) | 0.6 % | Not specified | EN ISO 62 |
| Density | 1.9 g/cm³ | Not specified | EN ISO 1183 |
| Glass content | 65–70% by weight | Not specified | EN ISO 1172 |
ILSS is published at 30 MPa, above the EN 13706 minimum of 25 MPa (FRP Profile Design Manual DOC-PF-2026-EN Rev. B). Compressive strength, Barcol hardness and water absorption are not specified by EN 13706 — the figures shown are typical industry values for this resin system, pending F1 certified test data; request certified values before final design. Values apply to the standard general-purpose laminate; fire-retardant, vinyl ester, epoxy, polyurethane and phenolic systems each have their own formulation sheet on the per-size datasheets.
How to use FRP technical data in design
Step 1
Select the laminate
Match the resin system and grade to corrosion, fire, temperature, moisture, and electrical requirements before using a mechanical property in a calculation.
Step 2
Combine material and geometry
Use the relevant modulus or strength with the actual section properties, span, restraint, load direction, and connection layout from the selected profile datasheet.
Step 3
Apply design factors
Convert characteristic or published values into project design values using the safety, environment, duration, temperature, and code factors required by the governing standard.
Calculate material mass with the FRP density calculator. For preliminary beam screening, pair this data with the FRP span tables and the profile calculator. Concentrated loads, buckling, holes, joints, fatigue, fire and sustained loads still need project-specific engineering review.
E40 evidence: full-section results above 40 GPa SGS reports · Sep 7, 2026
40.8 GPa reported average
SHIN2608002943CM01_EN
- Individual results (3 specimens)
- 41.2 / 41.1 / 40.1 GPa
- Product specification on page 1
- 60605
- Specimen dimensions on page 3
- 2160 × 90 × 90 mm
- Test span / rate
- 1800 mm / 9 mm/min
- Test method / conclusion
- EN 13706-2 Annex D / N/A (no pass/fail judgment)
41.5 GPa reported average
SHIN2608002943CM02_EN
- Individual results (3 specimens)
- 41.1 / 42.1 / 41.3 GPa
- Product specification on page 1
- 90905
- Specimen dimensions on page 3
- 1440 × 60 × 60 mm
- Test span / rate
- 1200 mm / 6 mm/min
- Test method / conclusion
- EN 13706-2 Annex D / N/A (no pass/fail judgment)
What E40 means here. E40 denotes a commercial 40 GPa-class performance tier. EN 13706 defines E17 and E23 grades; the use of its test method does not create an EN 13706 E40 grade or establish compliance with every grade requirement. See the EN 13706 grade comparison.
Size identification needs clarification. The supplied files are named for 60 × 60 × 5 and 90 × 90 × 5 mm tubes. CM01 lists specification 60605 on page 1 but a 90 × 90 mm specimen on page 3; CM02 lists 90905 but a 60 × 60 mm specimen. We preserve both originals and identify results by report number. A corrected report or laboratory clarification is needed before assigning either result to a specific catalog size.
Report scope. The reports state that results refer only to the tested samples and include an internal-reference note for research, teaching, quality control and product development. Their conclusion is N/A. They are not product certification, approval for structural use, or proof of facade-plate, bridge-system, fire or durability performance. Match the supplied section, laminate and batch to applicable evidence before design or procurement.
Original durability data in preparation
ASTM D543 and ISO 175 methodology
Chemical resistance: 2000 h in H₂SO₄, NaOH and Cl₂
Vinyl ester and isophthalic polyester profiles, 2000-hour exposure at concentrations relevant to chemical plants, pulp and paper, and water treatment. Tensile retention curves per resin system.
Ask about this programASTM G154 Cycle 1
UV durability: 5000 h
5000 hours of accelerated UV and moisture exposure. Surface blush, color shift (ΔE) and flexural retention by resin system: polyester, vinyl ester and UV-stabilized.
Ask about this programASTM D570, extended
Hydrolysis: 28 days in boiling water
Tensile and flexural retention and dimensional swelling after 28 days of boiling-water immersion, for water treatment, marina and coastal specifiers.
Ask about this programEN 45545-2, ASTM E84
Fire: EN 45545-2 and ASTM E84
Planned for phenolic and fire-retardant polyester variants: rail (EN 45545-2, hazard levels HL1–HL3) and North American building use (ASTM E84 Class A/B), with smoke density and toxicity.
Ask about this programASTM D7791
Fatigue: 10⁷ bending cycles
Cyclic flexural loading to 10 million cycles on I-beam and channel sections, with S–N curves at 30, 50 and 70% of ultimate load, for bridge deck, walkway and machinery-base specifiers.
Ask about this programASTM D2990
Creep: 1000 h sustained load
Sustained-load creep at 30, 50 and 70% of design stress, at room temperature and 60 °C, to derive a creep factor for long-span structural design.
Ask about this program
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