Steel Box Columns

Box columns are closed-section members built by welding steel plates, commonly used for steel structures with high load, stiffness or connection integration requirements. Diaphragms, stiffeners, connections, welding, distortion control, end preparation and inspection are reviewed against approved drawings.

Capabilities

  • Custom box column fabrication to drawing
  • Diaphragm and stiffener assembly
  • Inside/outside welding and end preparation
  • Dimensional control and distortion correction
  • NDT and inspection records (subject to discussion)
  • Foshan factory packing and container loading, worldwide sea freight

Technical Specifications

Form
Welded box section from steel plates
Grades
Q235B / Q355B / Q355C / Q460C
Section
Custom to approved drawing
End preparation
Per project requirements
Surface
Shot blasted / painted / galvanized (subject to discussion)
Inspection
Dimensional + NDT (per project)

Contact Us

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Fabrication to Drawing

Diaphragms, stiffeners, connections, welds, end faces and inspection are reviewed against approved drawings; section sizes are confirmed by project review and actual equipment capability.

Assembly & Welding

Inside/outside welding, end milling or alternative processes are evaluated to control assembly and welding distortion.

Quality Documents

Dimensional inspection records, NDT reports and material certificates are provided per project requirements.

Delivery

The Foshan factory provides professional packing and container loading, with sea freight as the main delivery method for overseas orders.

Frequently Asked Questions

What drawings are needed for a box column quote?

Provide section, segment, material, diaphragm/connection, weld, end face, inspection and transport requirements.

How are diaphragms and complex joints detailed?

Diaphragm assembly, welding sequence and distortion control are reviewed against approved drawings.

Which NDT methods are available?

UT, MT and PT are provided per project requirements on discussion.

How are members segmented, marked and transported?

Segmentation and marking follow transport limits; our Foshan factory provides professional packing and sea freight delivery.

Related Pages

Send your section and drawings for a box column fabrication proposal.

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Material certificates & inspection reportsFoshan factory · Sea freight delivery