Fiberglass flat bar 305×25 mm
Dimensions, section properties computed from the geometry and EN 13706 E23 mechanical data for the FB 305×25 pultruded profile.
- Model
- FB 305×25
- EN 13706 grade
- E23
- Published mass
- 13.86 kg/m
- Section area
- 7625 mm²
Start with your name and email. Product details and drawings can follow.
Cross-section and section properties
≈ 12.008 × 0.984 in, for reference only; the metric dimensions govern.
| Width (H) | 305 mm |
|---|---|
| Thickness (B) | 25 mm |
| Mass per meter (published) | 13.86 kg/m |
| Section property (calculated) | Value |
|---|---|
| Cross-section area A | 7625 mm² |
| Moment of inertia Ix | 5911 cm⁴ |
| Moment of inertia Iy | 39.71 cm⁴ |
| Section modulus Sx | 387.6 cm³ |
| Section modulus Sy | 31.77 cm³ |
| Radius of gyration rx | 88.05 mm |
| Radius of gyration ry | 7.217 mm |
| Torsion constant J | 150.7 cm⁴ |
| Mass per meter (calculated) | 14.5 kg/m |
Derived from the cross-section geometry by polygon integration. The published mass per meter is the catalog value; the calculated figure is a geometric cross-check. Because the modulus of FRP is about a tenth of steel's, deflection usually governs, so check spans in the profile calculator.
A dimensioned cross-section in DXF, free and without a login. It opens in AutoCAD, DraftSight, LibreCAD and other CAD packages.
Mechanical and physical properties
Internal catalog reference: profile:fb-305x25 (website reference, not a manufacturer SKU). Material dataset: E23-ISO. Revision: catalog-05fc2fc34578.
Confirm the section and material together with engineering. The design manual is a general reference; no public test report is mapped to this exact configuration. Supply and performance require confirmation. Published catalog mass for the default dataset; confirm finished-product mass.
The methods below identify measurement standards, not proof that this section was tested. Confirm manufacturing, required performance and the applicable report before specification.
Check evidence for this configuration| Property | Value | Test method |
|---|---|---|
| Tensile modulus (longitudinal) | 23 GPa | EN ISO 527-4 |
| Tensile modulus (transverse) | 7 GPa | EN ISO 527-4 |
| Tensile strength (longitudinal) | 240 MPa | EN ISO 527-4 |
| Tensile strength (transverse) | 50 MPa | EN ISO 527-4 |
| Flexural strength (longitudinal) | 240 MPa | EN ISO 14125 |
| Flexural strength (transverse) | 100 MPa | EN ISO 14125 |
| Interlaminar shear strength (ILSS) | 30 MPa | EN ISO 14130 |
| Pin-bearing strength (longitudinal) | 150 MPa | EN 13706-2 Annex E |
| Pin-bearing strength (transverse) | 70 MPa | EN 13706-2 Annex E |
| Compressive strength (longitudinal) | 240 MPa | EN ISO 604 |
| Barcol hardness | 45 | ASTM D2583 |
| Water absorption (24 h) | 0.6 % | EN ISO 62 |
- Resin:
- Isophthalic unsaturated polyester
- Glass content:
- 65–70% by weight
- Density:
- 1.9 g/cm³
- Grade:
- E23
- Fire:
- Standard grade — not fire-retardant (specify an FR grade for ASTM E84 Class 1)
Data basis: F1-published general-purpose laminate (FRP Profile Design Manual DOC-PF-2026-EN Rev. B); ILSS 30 MPa published above the EN 13706 minimum of 25 MPa; transverse values are EN 13706-3 Table 1 grade minimums. Standard isophthalic polyester is not fire-retardant — for ASTM E84 Class 1 specify the FR-E23 grade. 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.
Standards: EN 13706 Grade E23.
Values marked “Verify before release” are pending certified test data and are never estimated. Request batch-traceable certified data through the quote form before final design.
Other flat bars in the catalog 18 sizes
- FB 12×3 · 0.07 kg/m
- FB 20×3 · 0.11 kg/m
- FB 25×3 · 0.14 kg/m
- FB 25×5 · 0.23 kg/m
- FB 30×4 · 0.22 kg/m
- FB 38×4.8 · 0.33 kg/m
- FB 50×5 · 0.45 kg/m
- FB 50×6 · 0.55 kg/m
- FB 50×10 · 0.91 kg/m
- FB 75×6 · 0.82 kg/m
- FB 75×10 · 1.36 kg/m
- FB 100×6 · 1.09 kg/m
- FB 100×10 · 1.82 kg/m
- FB 100×15 · 2.73 kg/m
- FB 150×10 · 2.73 kg/m
- FB 150×15 · 4.09 kg/m
- FB 200×15 · 5.45 kg/m
- FB 305×25 · 13.86 kg/m
Applications, resin options and quotation details are on the fiberglass flat bar product page.
FB 305×25: common questions
How much does a fiberglass flat bar 305×25 mm weigh?
The published mass is 13.86 kg per meter (about 9.31 lb/ft), so a standard 6 m length weighs about 83.2 kg.
Is there a CAD drawing for FB 305×25?
Yes. A dimensioned DXF cross-section is a free download on this page, with no login. It opens in AutoCAD, DraftSight, LibreCAD and other CAD packages.
What is the lead time for FB 305×25?
FB 305×25 is a catalog section in 6 m standard lengths. Catalog sections ship in 2–4 weeks. Catalog dimensions identify standard section options, not live inventory. Confirm tooling, material, quantity and production timing in the quotation.
Need a quote for FB 305×25?
Send the dimensions, quantity, service conditions and destination. We reply within one business day.