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Welded Steel Structure Fabrication | Custom Structural Steel Fabrication Manufacturer

Welded Steel Structure Fabrication provides customized manufacturing of structural steel components for industrial, commercial, infrastructure and steel building projects.
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We fabricate steel beams, columns, trusses, brackets, frames, platforms and other welded structural components according to customer drawings and project specifications.

From material preparation, cutting and drilling to assembly, welding, surface treatment, inspection, packing and delivery, every production stage can be controlled according to project requirements.

Our fabrication service is suitable for contractors, EPC companies, steel structure companies, engineering companies, distributors and project developers looking for reliable customized structural steel components.

Welded Steel Structure Products We Fabricate

Our fabrication capabilities cover a wide range of structural steel components, including:

  • Welded H Beams

  • Structural Steel Columns

  • Structural Steel Beams

  • Welded Steel Frames

  • Steel Trusses

  • Steel Bracing Systems

  • Steel Platforms

  • Steel Support Frames

  • Equipment Support Structures

  • Steel Connection Plates

  • Base Plates

  • Gusset Plates

  • Stiffener Plates

  • Custom Steel Brackets

  • Heavy Welded Steel Components

  • Industrial Steel Structures

  • Steel Building Components

  • Custom Fabricated Steel Assemblies

Welded Steel Structure Fabrication (4)

Typical Product Specifications

Item Specification
Product Welded Steel Structure Fabrication
Material Q235, Q355, S235, S275, S355, ASTM A36, ASTM A572 or equivalent
Steel Type Carbon Steel / Structural Steel
Section Type H Beam, I Beam, Box Section, Channel, Angle, Plate, Custom Section
Plate Thickness Customized according to drawings
Component Length Customized
Welding Method MIG / MAG / CO₂ Shielded Welding / Submerged Arc Welding
Cutting Method CNC Plasma Cutting / Laser Cutting / Flame Cutting
Hole Processing CNC Drilling / Punching
Surface Treatment Shot Blasting / Sand Blasting / Painting / Galvanizing
Surface Color Customized
Manufacturing Tolerance According to drawings and project standards
Standards ASTM / EN / GB or project-specified standards
Inspection Dimensional Inspection / Weld Inspection / Visual Inspection
Packing Steel Frame / Bundle / Customized Export Packing
Application Industrial, Commercial, Infrastructure and Steel Building Projects
OEM / ODM Available

Welded Steel Structure Fabrication (6)

Our Fabrication Process

1. Drawing Review

Our engineering and production teams review customer drawings, technical specifications, dimensions, material grades, welding requirements and surface treatment requirements before production.

2. Raw Material Preparation

Steel plates, beams and sections are selected according to project requirements and inspected before fabrication.

3. CNC Cutting

Steel plates and sections are processed using CNC plasma cutting, flame cutting, laser cutting or other suitable methods depending on material thickness and project requirements.

4. Drilling & Machining

Connection holes, bolt holes and other machining requirements are completed using CNC drilling, punching and machining equipment.

5. Assembly

Steel components are positioned and assembled according to approved fabrication drawings to ensure dimensional accuracy.

6. Welding

Experienced welders perform structural welding according to the required welding procedure.

Depending on the product, welding processes may include:

  • MIG Welding

  • MAG Welding

  • CO₂ Shielded Welding

  • Submerged Arc Welding

  • Manual Arc Welding

7. Weld Inspection

Weld appearance, size, position and quality are inspected according to project requirements.

Additional non-destructive testing can be arranged where required by the project.

8. Surface Preparation

Fabricated steel components can be shot blasted or sand blasted to remove rust, scale and surface contaminants before coating.

9. Painting or Galvanizing

Surface protection options include:

  • Anti-Rust Primer

  • Epoxy Coating

  • Intermediate Paint

  • Finish Coating

  • Hot-Dip Galvanizing

  • Customized Anti-Corrosion Systems

10. Final Inspection & Packing

Dimensions, welds, connection plates, bolt holes, surface finish and component identification are checked before packing and shipment.

Welded Steel Structure Fabrication (1)

Complete Fabrication Service

We provide an integrated manufacturing process covering:

Material Preparation → Cutting → Drilling → Assembly → Welding → Surface Treatment → Inspection → Packing → Delivery

Why Choose Our Welded Steel Structure Fabrication Service?

Engineering Support

Our team can review fabrication drawings and help optimize components for manufacturing efficiency.

Customized Production

Different sizes, materials, thicknesses, connection details and surface treatments can be produced according to customer requirements.

Controlled Welding Quality

Welding parameters, weld appearance and structural connections are checked during production.

Dimensional Inspection

Critical dimensions, hole positions, connection plates and overall component dimensions are inspected before shipment.

One-Stop Manufacturing

Customers can source multiple steel fabrication processes from one supplier, reducing coordination between different manufacturers.

Export Project Support

Components can be marked and packed according to erection sequence, drawings or customer requirements for easier site identification.


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 Telephone: +86-151-2258-2058
 WhatsApp:  +8615122582058
 Email: sales@zsjhsteel.com
 Address: China,Tianjin