Built-up column fabrication — welded plate columns for heavy plant steel
Built-up columns are fabricated vertical members made from plate — I-section columns with plate flanges and web, or box columns for high compression and bi-axial loading. They appear throughout process plants on pipe rack bents, equipment support frames, and multi-storey industrial structures where rolled UC sections are insufficient. Sun Corporation fabricates built-up columns at our Hyderabad workshop with the same WPS/PQR and inspection regime as our beam and rack work.
Fabrication details procurement teams check
| Detail | Standard practice |
|---|---|
| Splice plates | Shop or site splices per connection design |
| Base plates | Drilled to anchor bolt template; grout space as shown |
| Stiffeners | At bearings, cap plates, and bracing connections |
| Bracing connections | Gusset plates and cleats per GA |
| Surface treatment | Blast, primer, or full paint system per spec |
| Documentation | MTC, weld map, NDT, dimensional report |
Hyderabad and pan-India supply
Columns are often the heaviest single pieces in a rack bent. We plan lift weights, transport permits, and site erection sequence with the EPC construction manager before fabrication release. Local supply from Jeedimetla suits Telangana and Andhra Pradesh industrial corridors; we dispatch built-up columns pan-India with our logistics coordination.
Quick Answer
Built-up column fabrication is the workshop assembly of fabricated steel columns from IS 2062 plate — welded I-section or box sections per approved shop drawings — when rolled UC sections cannot carry axial load, height or connection demand on industrial steel columns in pipe racks, plant buildings and heavy process structures across India.
Key Takeaways
- Built-up columns are specified for pipe rack bents, equipment frames and tall industrial bays where rolled sections are insufficient.
- Material is IS 2062 E250 or E350 plate with mill test certificates traceable to each piece mark.
- Fabrication follows IS 800:2007 with base plates, stiffeners and splices per structural connection design.
- Column design loads use IS 875 combinations on GA drawings — Sun Corporation fabricates to approved sizes, not redesign.
- As a steel fabrication company based in Jeedimetla, Hyderabad, we supply welded steel columns pan-India with EPC documentation packages.
EPC contractors, procurement managers and plant engineers evaluating built-up column fabrication vendors need workshop capacity for heavy plate welding, splice accuracy, base plate template matching and lift planning — not a rolled-section stockist. Sun Corporation Fabricators & Engineers fabricates heavy steel columns and structural steel columns for defined scope from issued-for-fabrication drawings. For flexural member design on adjacent rack girders, see our Plate Girder Design Guide; this section covers buyer specifications and workshop delivery.
Technical Specifications — Built-Up Columns
| Parameter | Typical Range / Standard |
|---|---|
| Section type | Welded I-column (H-section) or box column per drawing |
| Material | IS 2062 E250 BR / E350 BR plate and sections |
| Design & fabrication code | IS 800:2007; axial loads per IS 875 on GA |
| Column depth / width | 300 mm – 1,200 mm+ per structural design |
| Plate thickness | 8 mm – 40 mm+ (web and flange per design) |
| Base plates | Drilled to anchor bolt template; grout space as shown |
| Splices | Shop or site bolted/welded per connection design |
| Welding | SAW / FCAW on flange-web joints; IS 816 / IS 9595 WPS |
| NDT | UT / MPI per project ITP on coded welds |
| Surface treatment | Shot blast; primer, paint system or HDG per spec |
IS 2062 Grade Comparison for Built-Up Columns
| Grade | Yield (MPa) | Typical Column Use | Procurement Note |
|---|---|---|---|
| IS 2062 E250 | 250 | Standard pipe rack legs, warehouse portal columns, secondary frames | Common IS 2062 columns for moderate axial load |
| IS 2062 E350 | 350 | Heavy rack bents, tall process structures, high axial compression | Preferred for heavy industrial and multi-tier racks |
| IS 2062 E450 | 450 | High-stress or seismic-critical columns when specified | Higher welding QC and NDT attention |
Grade is defined on structural GA drawings. See IS 2062 Steel Grades Guide for full material data.
Applications — Industrial and Process Projects
- Industrial plants — pipe rack portal legs, equipment support frames, technological structures
- Warehouses & logistics — portal frame columns and mezzanine supports where rolled UC is insufficient
- Steel plants — heavy bent legs and building columns in material handling and mill areas
- Refineries — multi-tier rack columns sized for wind and piping tier loads (refinery steel structures)
- Process facilities — box columns for bi-axial loading and braced frame nodes in chemical and power BOP steel
Columns are often released with matching built-up beam fabrication on the same rack bent or building frame purchase order for coordinated erection.
Manufacturing Process
- Shop drawing approval — piece marks, splice levels and base plate details locked
- Plate procurement — IS 2062 plate verified against MTC before marking
- Cutting & bevelling — web and flange plates; stiffener profiles
- Fit-up & welding — jig-vertical assembly; SAW on flange-web seams
- Stiffeners & attachments — bearing, cap plate, bracing gussets per GA
- Base plate fit-up — template check against anchor layout from civil
- NDT, blast, paint & dispatch — lift weight marked; transport planning for heavy pieces
Workshop scope detail: Structural Steel Fabrication Guide.
Quality Control
QC includes heat-number traceability on all plate, WPS-referenced weld maps, NDT per ITP on full-penetration joints, plumb and straightness checks against IS 800 tolerances, and base plate hole pitch verification before dispatch. Built-up columns are often the heaviest lift on a rack bent — dimensional and marking accuracy at shop release prevents costly site alignment delays.
Applicable Standards
| Standard | Role on Built-Up Column Packages |
|---|---|
| IS 2062 | Plate and section grades; mill test certificate requirements |
| IS 800:2007 | Column design basis on GA; buckling checks; fabrication tolerances |
| IS 875 | Dead, live and wind loads used in column design combinations |
| IS 816 / IS 9595 | Welding procedure qualification and execution |
| IS 1893 | Seismic load combinations where columns are in braced frames |
Code references: IS 800 Guide · IS 875 Structural Design Loads Guide
Built-Up Columns vs Rolled Sections
| Criteria | Built-Up Column | Rolled UC / HB Section |
|---|---|---|
| Axial capacity | Custom plate thickness for high compression | Limited to mill catalog sizes |
| Section depth / width | Any proportion per design | Fixed rolled dimensions |
| Box sections | Fabricated for bi-axial and torsional stiffness | Not available as standard rolled UC |
| Connections | Heavy base plates and cap stiffeners integrated in shop | May need additional strengthening |
| Lead time | Plate fabrication + welding | Faster if stock section suits |
| Best for | Pipe rack bents, heavy plant frames, tall industrial columns | Light to medium portal frames |
People Also Ask
A built-up column is a fabricated vertical member assembled from steel plates into an I-section or box section, rather than a single rolled universal column from a mill catalogue.
When axial load, height, connection stiffness or box-section requirements exceed standard rolled UC capacity or availability on industrial EPC projects.
IS 800:2007 for design and fabrication acceptance, IS 2062 for material, IS 875 for load combinations on drawings — plus project welding and NDT specifications.
Plates are cut, fitted in vertical jigs, welded (typically SAW on flange-web joints), fitted with stiffeners and base plates, inspected per ITP, then blasted, painted and dispatched with piece marks.
Frequently Asked Questions
What built-up column types do you fabricate?
Welded I-section (H) columns and box columns from IS 2062 plate — with base plates, cap plates, stiffeners and bracing connections per approved shop drawings. Send GA for scope confirmation.
Do you fabricate pipe rack column bents?
Yes. Built-up legs for portal bents are core scope — often supplied with pipe rack fabrication longitudinals and bracing on the same EPC package.
How do you handle heavy column transport?
We plan module weights, transport permits and lift points with the EPC construction team before fabrication release — critical for tall rack legs and heavy box columns.
What should an RFQ include for built-up columns?
IFC or enquiry GA, anchor bolt template or civil interface drawing, coating spec, fabrication vs erection scope, ITP/NDT requirements and submittal format for PMC registers.
What is your enquiry response time?
Technical acknowledgement within 24 hours; quotation within 48–72 hours when drawings and scope boundaries are available.
Related fabricated products
- Built-up beam fabrication
- Plate girder fabrication
- Pipe rack fabrication
- Equipment support structures
Workshop credentials and enquiry
Plate and built-up fabrication at Jeedimetla, Hyderabad — IS 2062 plate and sections, IS 800:2007, WPS/PQR to IS 9595, in-house UT/MPI. Manufacturer credentials · Structural steel fabrication · Heavy steel fabrication
RFQ: Send IFC drawings or enquiry GA to Contact Sun Corporation. Response within 24 hours; quotation within 48–72 hours when drawings are available.