Fiberglass Structural Profiles

FRP Profile Types

I-Beam / H-Beam / Wide Flange Beam

FRP I-beams, H-beams and wide flange beams are engineered structural profiles for load-bearing frames, purlins and support beams. Fiberglass I-beam sections available in depths from 100mm to 300mm, with E-glass rovings and isophthalic or vinyl ester resin for high strength and corrosion resistance. I-beam profiles are ideal for long-span structures where weight is critical.

Angle / L Profile (Equal & Unequal)

FRP angle profiles (L profiles) include equal angle and unequal angle sections for framing, bracing and connection details. GRP angle profiles available in sizes from 25x25mm to 100x100mm. Angle profiles are commonly used for equipment frames, cable tray supports and structural bracing in corrosive environments.

U Channel / C Channel / Channel Profile

FRP U channels and C channels (GRP channel profiles, fiberglass U sections) are used for railings, cable trays, frame guides and edge protection. Available in sizes from 38x25mm to 200x50mm. Channel profiles provide excellent corrosion resistance for chemical plant structures and wastewater treatment plants.

Square Tube / Rectangular Tube / Round Tube

FRP square tubes, rectangular tubes and round tubes (GRP square hollow section, rectangular hollow tube) are pultruded hollow structural sections for handrails, ladder rails, fence posts and mast applications. Available in sizes from 20x20mm to 150x100mm. Hollow sections offer high strength-to-weight ratio and are non-conductive for electrical substation use.

Flat Strip / Solid Round Rod / T Profile / Z Profile

FRP flat strips, solid round rods, T profiles and Z profiles cover specialized structural and non-structural uses. Flat strips serve as reinforcement and connecting plates. Solid round rods are used for ladder rungs and handrail components. T profiles and Z profiles provide custom load distribution for specialized frame designs. Custom pultruded shapes available to customer drawings.

Specifications

Installation & Selection Guide

Step 1: Define Load Requirements

Calculate the maximum span, live load and dead load for your structural application. FRP profiles have comparable stiffness to steel at one quarter the weight, but deflection calculations should follow pultruded composite design standards.

Step 2: Choose Resin System

Standard isophthalic polyester for general indoor use. Vinyl ester for chemical plant and offshore environments. Phenolic for fire-retardant applications where low smoke and flame spread are required.

Step 3: Select Profile Shape

I-beams and H-beams for primary load-bearing beams. Channels for secondary supports and framing. Tubes for handrails and columns. Angles for bracing and connections. Custom shapes available for specialized loads.

Step 4: Surface Finish

Standard smooth surface for indoor use. UV-stabilised resin and surface veil for outdoor and sunlight exposure. Grit surface for anti-slip walking surfaces on structural profiles used as walkways.

FRP vs Steel vs Aluminium

Applications

FRP structural profiles are used across a wide range of industries:

Construction — roof purlins, wall girts, window frames and structural supports where weight and corrosion are concerns.

Platform & Walkway — support frames, handrail posts and stair stringers for industrial platforms.

Chemical Plant — structural frames, pipe supports and grating supports in corrosive acid and alkali environments.

Marine & Offshore — dock structures, gangway supports and offshore platform framing in saltwater.

Power & Electrical Substation — non-conductive structural frames, equipment supports and cable tray brackets where electrical insulation is critical.

Handrail & Ladder — handrail posts, rails, ladder side rails and rungs.

Wastewater Treatment — tank supports, walkway frames and structural elements in sewage and chemical treatment plants.

FAQ

What are FRP structural profiles?

FRP structural profiles are pultruded fiberglass reinforced plastic sections — including I-beams, angles, channels, tubes and custom shapes — used as corrosion-resistant, lightweight structural alternatives to steel and aluminium.

What is the pultrusion process?

Pultrusion pulls continuous fiberglass rovings and mats through a resin bath (polyester, vinyl ester or phenolic) and a heated steel die, forming constant-cross-section structural shapes with high glass content (60-75%) and excellent mechanical properties.

Are FRP profiles non-conductive?

Yes. FRP profiles are electrically insulating and non-magnetic, making them the standard choice for power substation frameworks, live equipment enclosures and sensitive electronics installations.

Can you make custom FRP profile shapes?

Yes. We offer custom pultruded profiles to customer drawings — custom cross-sections, colours, resin systems and surface finishes. Tooling lead time applies for new die profiles; standard shapes ship from stock.

What is the lead time for FRP profiles?

Standard profiles ship within 7-15 days from our Nantong factory. Custom shapes and large project quantities typically require 20-30 days including die preparation and production scheduling.

How do FRP profiles compare to steel on strength-to-weight?

FRP profiles offer comparable stiffness at roughly one quarter the weight of steel. This high strength-to-weight ratio reduces structural load on buildings, lowers installation labour costs and reduces shipping expense for large structural projects.

Buyer's Checklist

Before ordering FRP structural profiles, confirm:
☐ Load requirements (span, live load, dead load)
☐ Environmental conditions (chemical exposure, UV, saltwater)
☐ Electrical insulation requirements
☐ Fire rating requirements (standard vs phenolic)
☐ Custom cross-section drawings (if applicable)
☐ Quantity and delivery schedule
☐ Surface finish (smooth / UV-stabilised / grit anti-slip)

Why Choose FRP Structural Profiles?

FRP structural profiles deliver unique advantages over traditional construction materials:

Corrosion resistance — fiberglass composite does not rust, oxidise or degrade in acid, alkali, saltwater or chemical fumes. Structural profiles maintain their mechanical properties for decades without painting or cathodic protection.

Lightweight strength — at roughly one quarter the density of steel, FRP profiles reduce dead load on building structures, simplify handling and installation, and cut shipping costs. The high strength-to-weight ratio makes them ideal for long-span and retrofit applications.

Electrical insulation — FRP profiles are non-conductive and non-magnetic, eliminating stray current and electromagnetic interference. This makes them essential for power substations, transformer yards and live working platforms.

Low maintenance — no painting, no rust treatment, no regular inspection for corrosion. UV-stabilised resin and surface veils ensure long-term outdoor performance without degradation.

Design flexibility — the pultrusion process supports custom cross-sections, colour integration and surface finishes. Profiles can be cut, drilled, bonded and bolted on site using standard tools.

Pultrusion Process Explained

Pultrusion is a continuous manufacturing process for producing constant-cross-section FRP structural shapes:

1. Reinforcement feeding — continuous E-glass rovings, woven roving mats and surfacing veils are pulled from creels through a resin impregnation bath.

2. Resin impregnation — fibers are fully wetted in a thermoset resin system (isophthalic polyester, vinyl ester or phenolic), achieving uniform glass content of 60-75% by weight.

3. Forming die — wet fibers pass through a precision steel die that shapes the cross-section and controls resin flow. The die is heated to initiate polymerisation.

4. Curing — the profile cures as it travels through the heated die, forming a rigid composite with consistent mechanical properties along its length.

5. Pulling & cutting — a caterpillar puller draws the cured profile at controlled speed, and a flying cut-off saw trims it to customer-specified lengths.

Quality & Certifications

Our FRP structural profiles are manufactured under ISO 9001 quality management systems. All profiles comply with relevant ASTM standards for fiberglass composite structural shapes. Our factory in Nantong, China has supplied pultruded profiles to 45+ countries including Australia, Germany, the United Kingdom, the United States, Singapore, the UAE and Brazil. We support OEM branding, custom colour matching and project-specific testing requirements.

Custom & Special Shaped Profiles

Beyond standard structural profiles, we manufacture custom pultruded shapes to customer drawings. Our engineering team works with you to develop profile cross-sections that match specific load requirements, connection details and installation constraints. Custom dies can be produced within 2-3 weeks, and prototype samples are available for testing before full production runs. Common custom profiles include non-standard beam depths, specialized channel shapes, custom tube dimensions and proprietary structural sections for OEM applications.

Related Pages

Pultruded FRP Profiles (Product) · Pultruded Profiles Handbook · Applications Guide · FRP Grating · GRP Grating · Grating Clips