Structured Manufacturing Data (2026)

Structural Steel I-Beam

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Structural Steel I-Beam used in the Manufacture of Structural Metal Products sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Structural Steel I-Beam is characterized by the integration of Web and Flange. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Hot-rolled structural steel beam with I-shaped cross-section for load-bearing frameworks.

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Product Specifications

Technical details and manufacturing context for Structural Steel I-Beam

Definition
Structural steel I-beams are standardized hot-rolled steel sections with an I-shaped cross-section, manufactured through continuous casting and rolling processes. They serve as primary load-bearing elements in construction frameworks, industrial structures, and infrastructure projects. These beams are essential components in B2B supply chains for structural fabricators, construction companies, and engineering firms. Their standardized dimensions and mechanical properties enable predictable performance in structural calculations and assembly.
Working Principle
Distributes vertical and horizontal loads through its web and flanges, with the I-shaped geometry providing optimal strength-to-weight ratio for bending resistance.
Common Materials
Carbon steel, Low-alloy steel
Technical Parameters
  • Overall height of the I-beam cross-section (mm) Customizable
  • Width of the top and bottom flanges (mm) Customizable
Components / BOM
  • Web Part
    Resists shear forces and connects flanges
    Material: Structural steel
  • Flange Part
    Resists bending moments and provides compression/tension resistance
    Material: Structural steel
  • Fillet Part
    Radius transition between web and flange to reduce stress concentration
    Material: Structural steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Structural Steel I-Beam.

Universal Beam I-Section Steel Rolled Steel Joist hot rolled structural steel I-beam carbon steel I-beam for construction load-bearing structural steel beam custom size steel I-beam supplier high yield strength structural beam

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Not applicable (structural load-bearing component, not pressure vessel)
other spec: Maximum deflection limit: L/360 typical for floors, L/240 for roofs (where L = span length); Corrosion allowance: 1-3mm depending on environment
temperature: -40°C to 400°C (ambient to elevated service, dependent on steel grade and coating)
Media Compatibility
✓ Indoor structural framing (dry environments) ✓ Bridge construction (protected with corrosion coating) ✓ Industrial mezzanine flooring (non-corrosive atmospheres)
Unsuitable: Continuous immersion in seawater or chemical processing environments with pH <4 or >10 without specialized coatings
Sizing Data Required
  • Maximum applied load (kN/m or total kN)
  • Span length between supports (meters)
  • Required safety factor (typically 1.5-2.0 for structural applications)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking
Cause: Cyclic loading from operational vibrations, wind forces, or machinery leading to crack initiation and propagation at stress concentrators like welds, bolt holes, or sharp corners.
Corrosion-induced section loss
Cause: Exposure to moisture, chemicals, or salt leading to rust formation, pitting, and thinning of the flange or web, reducing load-bearing capacity.
Maintenance Indicators
  • Visible rust streaks or flaking paint indicating active corrosion
  • Audible creaking or popping noises under load suggesting joint loosening or crack propagation
Engineering Tips
  • Implement regular non-destructive testing (e.g., ultrasonic or magnetic particle inspection) at high-stress areas to detect early-stage cracks
  • Apply and maintain protective coatings (e.g., galvanizing or epoxy paints) and ensure proper drainage to prevent water accumulation on surfaces

Compliance & Manufacturing Standards

Reference Standards
ASTM A6/A6M - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling EN 10025 - Hot rolled products of structural steels ISO 630 - Structural steels
Manufacturing Precision
  • Web thickness: +/- 0.5% of nominal thickness
  • Flange width: +/- 2 mm for widths up to 200 mm
Quality Inspection
  • Ultrasonic Testing for internal defects
  • Tensile Test for mechanical properties

Factories Producing Structural Steel I-Beam

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Frequently Asked Questions

What are the main applications of structural steel I-beams?

Structural steel I-beams are primarily used in construction for load-bearing frameworks in buildings, bridges, industrial structures, and infrastructure projects where high strength-to-weight ratio is required.

What materials are available for these I-beams?

Our structural steel I-beams are manufactured using carbon steel and low-alloy steel, offering different strength and durability characteristics to meet various structural requirements and environmental conditions.

How do I determine the right I-beam size for my project?

The appropriate I-beam size depends on load requirements, span length, and building codes. Key specifications include depth, flange width and thickness, web thickness, and weight per meter. Consult with our engineers for proper sizing based on your structural calculations.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Manufacture of Structural Metal Products.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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