Box Steel Column Fabricators Q235B Q355B ASTM A36 Structural Beams
Price:
USD900-USD1500 Per Ton
MOQ:
30 Ton
Delivery Time:
30 Days
Brand:
Ruly Steel
Product Description
Box Steel Column / Welded Structural Steel Fabricators
Box Type Metal Process for structural steel fabrication with superior strength and durability.
Product Specifications
| Attribute | Value |
|---|---|
| Application | Box Steel Column Beams |
| Type | Structural Steel Fabricators |
| Raw steel material | Q235B, Q355B, ASTM A36 |
| Surface treatment | Painting or Hot-dip Galvanize |
| Shot blasting level | Sa 2.5 |
| Service life | 50 Years |
| Process criterion | AWS D1.1, GB |
| Installation | Engineer guidance on site |
Product Overview
Welded steel box beams and columns are widely used in steel structure projects. Unlike H-shaped steel columns with only one strong axis, box columns provide superior strength in both X and Y directions, with stiffening plates at nodes creating strong node domains for better force distribution.
Fabrication Method
Box-shaped columns are welded from four steel plates using a process similar to welded H-shaped steel:
- Precision cutting with CNC flame cutting machines
- Carbon arc gouging for K-shaped groove cutting
- Straightening correction after blanking
- Assembly using specialized jigs and fixtures
- Submerged arc welding for main body
- Manual welding for stiffening plates
- Electroslag pressure welding for separators
- Final straightening and end milling
Technical Specifications
| Parameter | Specification |
|---|---|
| Grade | Q235B, SS400, Q345B, S235JR, S275JR, ASTM-A36 |
| Size | 100x100mm - 1500x1500mm |
| Thickness | 8mm - 100mm |
| Length | 2 - 20 meters |
| Shape | Box shaped |
| Delivery Time | 7-15 Days (stock size), 20-40 Days (customized) |
Quality Control
- Raw material thickness tolerance <0.25mm
- In-house yield and tension strength testing
- Third-party inspection certificates available
- Traceable mill certificates
- Dimension tolerance <1mm
- 20% ultrasonic testing of welding lines
- 20% magnetic powder testing
- Shot blasting grade Sa 2.5
- Paint primer application within 5 hours
- Dry Film Thickness (DFT) >75UM
Our Services
- Structural steel fabrication, painting, galvanizing, pre-assembly
- Design and installation of prefabricated steel structures
- Fabrication drawing development from architectural plans
- Engineering consulting services
Project Experience
- Light gauge prefabricated steel warehouses and workshops
- Heavy industrial steel structures with cranes
- Truss roof steel structures
- Steel frame cold storage facilities
- Prefabricated residential buildings
- Parking structures and garages
- Heavy industrial steel fabrication
Why Choose Us
- Professional design team for customized solutions
- Skilled fabrication team with advanced equipment
- One-stop service for complete project solutions
- Comprehensive quality control processes
- Dedicated after-sales service and support
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Qingdao Ruly Steel Engineering Co.,Ltd
Location
Tieshan Industrial zone, Huangdao District, Qingdao City.
Contact Person
steven