01
Design Review
Drawings, BOQ and building requirements are checked against GB, ASTM/AISC or EN detailing standards as specified, and open items are listed before the fabrication scope is fixed.
Factory Capability
Steel Structure Manufacturing for Project-Based Requirements
We fabricate primary and secondary steel structures to GB, ASTM/AISC or EN standards as specified, inspect them against the approved drawings, and prepare them for container shipment.
Send drawings or a BOQ for a scope review before quotation. We reply within 24 hours.
Manufacturing Process
From Design Review to Container Loading
The stages below are the review points we work through with you, from drawing review to container loading.
02
Material Preparation
Primary members use Q235B or Q355B structural steel to GB/T 700 and GB/T 1591. ASTM A36, A572 Gr.50, EN S235 and EN S355 equivalents are available on request, with mill test certificates issued against the shipment.
03
Fabrication
CNC flame and plasma cutting, drilling and jig assembly produce primary frames, beams, columns and trusses to the approved member list.
04
Welding
Main member welds use submerged arc welding; CO2 / MAG covers secondary members and connection details. Weld procedures and welder qualification follow the standard specified for the project.
05
Inspection
Dimensional checks, weld visual inspection and ultrasonic or magnetic particle testing where specified. Results are recorded against the member list and released before surface treatment.
06
Painting
Shot blasting to Sa 2.5 followed by a primer, intermediate and topcoat system, or hot-dip galvanizing to ISO 1461 / ASTM A123. Dry film thickness is measured and recorded.
07
Packing
Components are bundled by type and marked against the packing list. Connection faces and machined surfaces are protected for sea freight.
08
Container Loading
A loading plan is prepared from component weights, lengths and container type, and the loading sequence is photographed before departure.
Workshop & Equipment
From workshop production to delivery
See production equipment, component inspection and delivery preparation from our steel fabrication workflow.
Production equipment
Equipment used during steel structure fabrication and component preparation.
Component inspection
Fabricated steel components are checked in the workshop before finishing and packing.
Delivery preparation
Completed steel components are organized for protected road transport and onward shipment.
Process media
Welding process
A close view of structural steel welding during fabrication.
Quality Control
Quality Checkpoints for Manual Review
Each shipment is checked against the approved drawings, member list and coating specification before release.
- 1
Material Check
Steel grade and heat numbers are checked against mill test certificates before cutting.
- 2
Fabrication Inspection
Member dimensions, hole positions, weld sizes and assembly tolerances are checked against the approved drawings.
- 3
Dimensional Check
Overall length, squareness, camber and hole groups are measured before surface treatment.
- 4
Surface Inspection
Shot-blast grade, coating dry film thickness and galvanizing coverage are inspected and recorded.
- 5
Packing Inspection
Bundle contents, marking and protection are checked against the packing list before loading.
Surface Treatment, Packing & Loading
Prepare finish and shipment requirements around the confirmed scope
Surface preparation, coating, marking, protection and loading are handled as one sequence from fabrication release to container departure.
Export Packing
Bundles are marked to the packing list with connection faces protected. Loose and small parts are packed separately and itemised.
Container Loading
Loading plans use 40HQ, 40OT or 20GP containers, taking component weights, lengths and the unloading sequence into account.
Shipping Preparation
Packing list, mill test certificates and loading photographs are issued with the shipment. Loading ports are Qingdao or Tianjin.