Fiberglass flat bars (FRP bar stock)
Solid rectangular pultruded fiberglass bar stock for spacers, stiffeners and fabricated parts. Compare catalog sections, then specify cut lengths, tolerances, machining and the service requirements for your part.
- A
- 1,000 mm²
- Ix
- 83.3 cm⁴
- Mass
- 1.82 kg/m
Overview
Select flat bar stock by width, thickness and installed orientation. For a spacer or fitted part, identify the mating faces and required clearance. For a stiffener or splice, include the loads, holes and bearing details so the member and its connections can be assessed together.
Agree dimensional tolerances and any machining on the part drawing. Concrete reinforcement belongs in the dedicated rebar inquiry route, with its own material, bond and acceptance requirements.
- Solid rectangular stock
- Specify fit and tolerances
- Machining to agreed drawing
- 6 m lengths or cut to size
Sizes 18 catalog sizes
| Model | Drawing and quote | ||||||
|---|---|---|---|---|---|---|---|
| FB 12×3 | 12 | 3 | 0.07 | 36 | 0.043 | 0.003 | DXFQuote |
| FB 20×3 | 20 | 3 | 0.11 | 60 | 0.2 | 0.005 | DXFQuote |
| FB 25×3 | 25 | 3 | 0.14 | 75 | 0.391 | 0.006 | DXFQuote |
| FB 25×5 | 25 | 5 | 0.23 | 125 | 0.651 | 0.026 | DXFQuote |
| FB 30×4 | 30 | 4 | 0.22 | 120 | 0.9 | 0.016 | DXFQuote |
| FB 38×4.8 | 38 | 4.8 | 0.33 | 182.4 | 2.195 | 0.035 | DXFQuote |
| FB 50×5 | 50 | 5 | 0.45 | 250 | 5.208 | 0.052 | DXFQuote |
| FB 50×6 | 50 | 6 | 0.55 | 300 | 6.25 | 0.09 | DXFQuote |
| FB 50×10 | 50 | 10 | 0.91 | 500 | 10.42 | 0.417 | DXFQuote |
| FB 75×6 | 75 | 6 | 0.82 | 450 | 21.09 | 0.135 | DXFQuote |
| FB 75×10 | 75 | 10 | 1.36 | 750 | 35.16 | 0.625 | DXFQuote |
| FB 100×6 | 100 | 6 | 1.09 | 600 | 50 | 0.18 | DXFQuote |
| FB 100×10 | 100 | 10 | 1.82 | 1,000 | 83.33 | 0.833 | DXFQuote |
| FB 100×15 | 100 | 15 | 2.73 | 1,500 | 125 | 2.813 | DXFQuote |
| FB 150×10 | 150 | 10 | 2.73 | 1,500 | 281.3 | 1.25 | DXFQuote |
| FB 150×15 | 150 | 15 | 4.09 | 2,250 | 421.9 | 4.219 | DXFQuote |
| FB 200×15 | 200 | 15 | 5.45 | 3,000 | 1,000 | 5.625 | DXFQuote |
| FB 305×25 | 305 | 25 | 13.86 | 7,625 | 5,911 | 39.71 | DXFQuote |
Catalog dimensions identify standard section options, not live inventory. Confirm tooling, material, quantity and production timing in the quotation.
Wider than 305 mm: fiberglass sheetsA size not listed: custom pultrusion
Properties
Material reference · E23-ISO
Published reference values for the general-purpose isophthalic polyester laminate. Match the section, formulation and supporting documents before selecting design values for an order.
| Property | Reference value | Method reference |
|---|---|---|
| Tensile modulus (longitudinal)EN ISO 527-4 | 23 GPa | EN ISO 527-4 |
| Tensile modulus (transverse)EN ISO 527-4 | 7 GPa | EN ISO 527-4 |
| Tensile strength (longitudinal)EN ISO 527-4 | 240 MPa | EN ISO 527-4 |
| Flexural strength (longitudinal)EN ISO 14125 | 240 MPa | EN ISO 14125 |
| Interlaminar shear strength (ILSS)EN ISO 14130 | 30 MPa | EN ISO 14130 |
| Pin-bearing strength (longitudinal)EN 13706-2 Annex E | 150 MPa | EN 13706-2 Annex E |
| DensityEN ISO 1183 | 1.9 g/cm³ | EN ISO 1183 |
| Glass contentEN ISO 1172 | 65–70% by weight | EN ISO 1172 |
The listed moduli, tensile and flexural strengths, and pin-bearing strength use EN 13706-3 E23 minimums. ILSS, density and glass content are the published E23-ISO material references. These values and method names do not constitute a test report for the selected profile. Full property table and test methods
Match the material data to the proposed flat bar and its installed orientation. Fabricated joints, wearing surfaces and fitted parts require acceptance criteria for their specific function.
Resin routes to review
- Isophthalic polyesterThe E23-ISO reference uses this resin family. Confirm its suitability for the profile and service conditions.
- Fire-retardant polyesterState the required fire test and classification, then confirm evidence for the offered formulation and specimen scope.
- Vinyl esterA candidate for chemical exposure. Provide the chemicals, concentrations, temperatures and exposure duration; specify fire requirements separately.
- PolyurethaneReview the proposed profile, processing route and mechanical requirements with the supplier.
- PhenolicA route to evaluate where fire, smoke or toxicity criteria apply. Confirm manufacturability and the relevant test evidence.
A change of resin, reinforcement, pigment or surface finish can change the applicable properties and evidence. Confirm the grade and reports for the offered configuration. Compare resin systems
Applications
Case study · Project photoFactory access staircaseA bolted FRP stair in our Chongqing plant, assembled by four people with hand tools: no welding, hot work or crane.Profiles used Flat bar kick plates in UV-stabilized polyester
ApplicationFRP chemical plant platformsFRP angles and flat bars for bracing, toe boards, and splice plates.
Application · Project photoFRP solar mounting profilesFlat bars and custom sections for clips, spacers, and edge members.
Documents
- Data sheet18 sizes · web page
Flat bar datasheets
- Issued by
- F1 Composite
One page per size: dimensions, calculated section properties, E23 laminate data and, where published, allowable load by span.
- CADDXF · 18 sizes
Flat bar section drawings
- Issued by
- F1 Composite
Dimensioned cross-sections that open in AutoCAD, DraftSight or LibreCAD. Download one from its row in the size table; no login or email.
- Data sheetPDF · 3 MB
FRP Profile Design Manual — DOC-PF-2026-EN Rev. B
- Issued by
- F1 Composite
- For
- Structural shapes
Revision B (October 2026), generated from the website's catalog, laminate and design-basis data: EN 13706 E23 laminate values beside the grade minimums, section properties of all 114 catalog sizes, allowable uniform loads to the published LRFD screening basis, application guides, durability stated by resin formulation, fabrication and inspection. A preliminary-sizing reference, not a project approval or batch certificate; it supersedes the withdrawn Rev. A.
- CertificatePDF · 142 KB
EPD & Carbon Footprint — Pultruded GFRP Composite Profiles
- Issued by
- CABR
- For
- Standard profiles
Unofficial English summary of the environmental product declaration and carbon footprint analysis for pultruded GFRP composite profile products, with 1 m² functional unit. Calculation reference CABR-CFC-01(02)-2025(20030)1, cradle-to-gate 33,934.34 g CO₂e/m², distribution 254.59 g, cradle-to-grave 36,099.32 g. Standards: GB/T 24025-2009 (ISO 14025-aligned Type III EPD), GB/T 32161-2015, ISO 14067, PAS 2050. Issued by China Academy of Building Research Co., Ltd. (CABR) Certification Center on April 30, 2025. The original Chinese documents, with the holder and scope, are provided on request.
- CatalogOn request
Product Catalog 2024
- Issued by
- F1 Composite
- For
- All products
Complete catalog of standard pultruded FRP profiles with dimensions, properties, and ordering information.
- CertificateOn request
ISO 9001 Certificate
- For
- All products
Request the current quality-management certificate with its edition (ISO 9001:2015, or ISO 9001:2026 after transition), holder, validity and scope for your proposed supply.
- CertificateOn request
CE Declaration of Performance
- For
- All products
Request product-specific performance and applicable conformity documentation; confirm the intended use and assessment route.
Questions buyers ask
What are pultruded FRP flat bars used for?
Flat bars provide rectangular profile lengths for spacers, stiffeners and fabricated parts. State whether the part carries load, controls a fit or contacts a moving surface so its geometry, material and acceptance requirements can be reviewed. Structural splice plates and wear components need application-specific checks beyond a catalog width and thickness.
How does FRP flat bar compare to steel flat bar?
Compare sections selected for the same loading, span, orientation and connection requirements. The table lists published catalog mass and nominal geometry, while stiffness and strength require data for the proposed laminate. Equal width and thickness do not establish an equivalent replacement for a steel part.
What tolerances do F1 Composite flat bars hold?
Specify width, thickness, cut length, straightness and flatness where they affect fit. Include the mating detail and inspection method for critical dimensions. The drawing and quotation establish the agreed tolerances and any machining needed; a single fixed tolerance does not apply to every catalog size.
Can FRP flat bars replace steel rebar in concrete?
Use the dedicated FRP rebar route for concrete reinforcement. A reinforcement or prestressing product needs a defined bond surface or anchorage, material properties and project acceptance criteria. A standard flat bar is not qualified for those roles by its shape or glass content alone.
Quote FRP flat bars
Send the width, thickness, cut lengths and quantities, with the fit, machining and service requirements for the part. We reply within one business day; a formal quotation follows once the specification and delivery are reviewed.
- Lengths & tolerances
- Use 6 m as the standard-length inquiry reference or specify cut lengths and counts. Identify the required tolerance standard, holes and end cuts on your drawing; available lengths and dimensional acceptance are confirmed for the selected section.
- Resin & surface
- Give the chemicals, concentrations, temperature, outdoor exposure, color and fire requirements. Review the proposed resin, reinforcement and surface treatment against those conditions and the evidence for the offered material.
- Quantity & samples
- Give the trial quantity, expected repeat demand and target delivery date. Minimum quantities, sample arrangements and the production schedule are confirmed for the section, material and fabrication scope in the quotation.
- Documents & delivery
- List the required drawings, material reports and batch inspection records. Confirm which documents cover the offered product, any additional testing, the packing method and available delivery terms for your destination.