Carbon Fiber Structural Beams: I-Beams, Angles, and Custom Profiles

 

When structural assemblies need to reduce component mass without a full redesign, engineers replace aluminum or steel profiles with carbon fiber beams and profiles that match the same cross-section geometry. Carbon fiber structural beams deliver equivalent or higher bending stiffness at significantly lower weight, with no change to fastener patterns or bonding interfaces when cross-sections are matched to drawing.

Xinbo Composites manufactures custom carbon fiber structural beams to OEM drawings from its Shenzhen facility. Product types include I-beams, angle sections, C-channels, hat stiffeners, truss members, and mounting brackets. All cross-section dimensions, fiber layup schedules, and surface finishes are customer-specified. This article covers manufacturing capability, drawing requirements, and how to request a quote.

Carbon Fiber Beams: Manufacturing Capability and Profile Types

Xinbo manufactures structural carbon fiber beams and profiles using autoclave prepreg layup. Fiber orientations are specified per ply to match the primary load paths in each cross-section. Standard Modulus carbon fiber is used for most carbon fiber beam applications. Medium Modulus and High Modulus grades are available where higher stiffness at the same cross-section is required. Kevlar hybrid plies can be incorporated for impact-sensitive bracket and truss applications.

Available profile types: I-beams, angle sections (equal and unequal leg), C-channels, hat stiffeners, and custom closed or open sections to drawing. Carbon fiber beams can be manufactured with woven 0/90 plies for balanced bidirectional stiffness, or with UD-dominant schedules in the load-bearing flanges for maximum axial performance. Both matte and gloss surface finishes are available, as well as raw unfinished profiles for customers who perform secondary bonding or machining.

Secondary CNC machining is available after cure for drilling and trimming. Prototype quantities are accepted. Production lead time and dimensional tolerances are confirmed at quotation based on cross-section complexity and quantity.

Carbon Fiber I-Beam and Carbon Fiber Angle Profile Specifications

A carbon fiber i beam drawing should specify: overall height (web height plus flanges), flange width, web wall thickness, flange wall thickness, total length, and fiber layup schedule. Carbon fiber i beams are manufactured as custom layup parts, not by pultrusion, which allows off-axis plies to be included for torsional stability and shear resistance. Pultruded profiles cannot provide this because fiber runs only in the 0-degree direction.

For carbon fiber angle profiles, the drawing should specify leg lengths (equal or unequal), wall thickness, corner radius, and length. A carbon fiber angle section is used for frame joints, corner bracing, and surface attachment where two faces meet at 90 degrees. Carbon fiber L bracket components are ordered for mounting plates, gussets, and structural connections in robotics and UAV frames. For applications where a carbon fiber tube combined with bracket hardware is more practical than a fabricated profile, Xinbo's round tube range covers OD 5mm to 500mm with walls from 0.6mm.

Carbon Fiber Truss Structures, Brackets, and OEM Applications

Carbon fiber truss structures distribute applied loads through triangulated members in tension and compression, achieving high structural efficiency over long spans at low weight. OEMs order carbon fiber truss structure assemblies for robotics gantry frames, UAV ground test rigs, camera crane jibs, industrial inspection systems, and antenna mast structures. Carbon fiber support beams and cross-members are ordered for surgical table rails, medical imaging tables, and precision measurement frames where deflection under load must be minimized.

Carbon fiber brackets are ordered alongside tube and plate components when customers are building a complete structural assembly. Custom carbon fiber brackets are manufactured as flat layup parts or formed angle sections, CNC-machined to final dimensions. Customers building full assemblies typically combine carbon fiber brackets and gussets with carbon fiber sheets and plates for flat laminate components. Xinbo can quote the full assembly bill of materials from a single set of drawings.

Ordering Custom Carbon Fiber Structural Components

To quote carbon fiber structural components, Xinbo needs a drawing with: cross-section shape and dimensions, web and flange wall thickness, fiber layup schedule or performance requirement, total length, surface finish, and quantity. A CAD drawing or dimensioned PDF is required. Engineers working on carbon fiber structural design who do not have a layup specified can provide a stiffness or load requirement, and Xinbo's technical team will recommend the appropriate fiber architecture.

Carbon fiber structural beams, angle profiles, and carbon fiber bracket parts are supplied as standard items within Xinbo's custom carbon fiber parts capability. Request a quote via the contact form with your drawing attached.

Frequently Asked Questions

What is the difference between a carbon fiber i beam and a carbon fiber angle profile?

A carbon fiber i beam resists bending in one primary axis using flanges and a connecting web, making it suited for span and cross-member applications. A carbon fiber angle profile joins two flat faces at 90 degrees and is used for frame joints, corner bracing, and structural attachment points.

What industries order carbon fiber support beams and structural profiles from Xinbo?

Carbon fiber support beams and structural profiles are ordered by OEMs in robotics, aerospace, UAV manufacturing, medical imaging, and industrial inspection. Applications include gantry frame cross-members, surgical table rails, UAV longerons, and antenna mast structural sections.

What carbon fiber structural components can Xinbo manufacture to drawing?

Xinbo manufactures carbon fiber structural components including I-beams, angle sections (equal and unequal leg), C-channels, hat stiffeners, mounting brackets, and custom open or closed profiles. Cross-section geometry, wall thickness, fiber layup, and length are all customer-specified.

Can Xinbo supply carbon fiber brackets and carbon fiber truss members as part of a larger assembly order?

Yes. Carbon fiber brackets and truss members are quoted alongside tube and plate components from a single set of drawings. Xinbo can provide a bill of materials quote covering all structural profile types in one order.