I-beamsWide-flange sections with the most flexural stiffness, for walkways, bridges and platforms.76×38 to 305×305 mmView all sizes F1-STRUX· Standard profiles
Fiberglass structural shapes & sizes
F1 Composite's standard fiberglass structural shapes are pultruded I-beams from 76×38 to 305×305 mm, channels from 38×13 to 360×108 mm, angles from 25×25 to 152×152 mm, square and rectangular tubes from 25×25 to 240×240 mm, round tubes from 25 to 150 mm OD, flat bars and rods, supplied in 6 m standard lengths to EN 13706 E17/E23 and ASTM D3917 requirements. Each family lists dimensions and weights, with datasheets and DXF drawings for catalog sizes. Catalog sizes are standard options, not live stock: confirm resin, quantity and production timing in the quotation.
FIG. 1 Standard sections
Browse fiberglass structural shapes by section family 7 families · 114 sizes
- I-beamsWide-flange sections with the most flexural stiffness, for walkways, bridges and platforms.76×38 to 305×305 mmView all sizes
ChannelsOpen-section framing for cable supports and modular assemblies.38×13 to 360×108 mmView all sizes 
AnglesEqual and unequal legs, for stiffeners, bracing and ledger supports.25×25 to 152×152 mmView all sizes 
Square and rectangular tubesClosed sections with high torsional stiffness for columns, trusses and frames.25×25 to 240×240 mmView all sizes 
Round tubesFor handrails, guardrails and structural tubing.25 to 150 mm ODView all sizes 
Solid rodsUnidirectional rods for tie-rods, soil nails, rock bolts and stakes.Ø6 to Ø50 mmView all sizes 
Flat barsStiffeners, splice plates, wear strips and spacers.12×3 to 305×25 mmView all sizes 
Custom profilesA section the catalog does not cover, developed from your drawing.Up to 600 × 300 mmStart a custom profile
Check a section before you order
Filter the catalog, check a beam or a column, plan the cut list and compare prices and life-cycle cost, all against the same published section data.
Profile finderFilter the standard sizes by shape, size, mass and stiffness, and compare up to four.Open the tool 
Profile calculatorBending, shear and deflection for a section, span and load, with the steel equivalent.Open the tool 
Column bucklingGlobal and local buckling and crushing of I-beams and tubes, with the lightest sizes that pass.Open the tool 
Span tablesAllowable uniform loads for the published I-beams, channels and tubes over 1 to 6 m spans.Open the tool 
Cut list optimizerNest piece lengths into 6 m or 12 m bars and see the bars to order, waste and weight.Open the tool 
Unit converterMetric and US units, and inch profile sizes matched to the closest catalog size.Open the tool 
Price estimatorPlanning prices per meter by section, resin, finish and volume.Open the tool 
Life-cycle costFRP against galvanized or painted steel over the life of the project, as present values.Open the tool
Standard FRP profiles — frequently asked questions
Quick answers for engineers and procurement teams comparing pultruded fiberglass structural shapes against steel and aluminum options.
Which FRP profile do I need for my application?
For walkways, platforms, and bridges → FRP I-beam (max stiffness). For framing, cable trays, modular skids → FRP channel. For stiffeners, bracing, ledgers → FRP angle. For trusses, columns, frames → FRP square tube (max torsional rigidity). For handrails, antennas, conduits → FRP round tube. For concrete reinforcement requiring a bond surface and bar-specific qualification, use the dedicated FRP rebar range rather than a smooth structural rod. Use our AI sourcing assistant or send the span and load for an engineering review.
Are F1 Composite standard profiles certified to EN 13706 and ASTM D3917?
Confirm the certificate holder, product or specimen, report number, method, date and scope. EN 13706 and ASTM D3917 are specification references, not proof of blanket certification. CE/UKCA documentation depends on the product, intended use and applicable assessment route.
Are catalog sections available from stock?
Catalog dimensions identify standard section options, not live inventory. Confirm tooling, material, quantity and production timing in the quotation.
Can FRP profiles be cut, drilled, and bolted on-site?
Yes. Pultruded FRP profiles can be cut with a circular saw and carbide-tipped or diamond blade, drilled with carbide bits, and joined with stainless or FRP fasteners. Use of standard steel tools is acceptable; coolant is not required. We supply free fabrication guidelines covering bolt hole edge distances, post-cut sealing of cut edges, and recommended fastener torques.
Who are the top pultruded FRP profile manufacturers, and where does F1 Composite fit?
The global market for pultruded FRP structural profiles includes Strongwell (EXTREN®, USA), Creative Pultrusions (USA), Fiberline Composites (Denmark), Exel Composites (Finland), and large manufacturers based in China. F1 Composite's F1-STRUX structural range (I-beams, channels, angles, tubes, flat bars and rods) is made to EN 13706 E17/E23 and ASTM D3917 requirements. Products ship directly from our factory in China without a regional distributor markup.
Is there a China-based alternative to Strongwell, Creative Pultrusions, Fiberline, or Exel?
Compare the proposed geometry, material grade, mechanical properties, tolerances and inspection evidence against the original specification. A similar section or standard reference does not establish interchangeability. Send the project requirements for a product-specific comparison.
Need engineering data or a quotation for standard profiles?
Send the size, length and quantity, the service environment and the destination. We reply within one business day; a formal quotation follows once the specification and delivery are reviewed.
- Lengths & tolerances
- Catalog sections come in 6 m lengths or cut to your length. Give the piece length and count, say whether ASTM D3917 or EN 13706 tolerances apply, and mark any tighter tolerances, holes or end cuts on the drawing.
- Resin & surface
- Polyester suits general structural use; vinyl ester is the usual choice for chemicals, seawater and wastewater. Tell us the chemicals, concentration, temperature, outdoor exposure, color and any fire requirement, and we will confirm the resin and surface veil.
- Quantity & samples
- Catalog sections ship in 2–4 weeks. Give the trial quantity and the expected repeat demand; minimum quantities and samples are confirmed for the section and resin you choose.
- Documents & delivery
- Each production batch ships with a mill test certificate. Include the destination and target date, and we will quote FOB or DDP with the packing method and shipping schedule.