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Heavy-Duty Manufacturing.

Industrial Steel Buildings

Robust portal frames and multi-tier structures precisely engineered to support heavy overhead cranes and relentless, continuous industrial operations.

What Industrial Steel Buildings Projects Demand From the Steel

The problems clients bring us most often on this kind of project, and how the steel package answers each one.

THE CHALLENGE

Overhead cranes decide the frame before the price does

SJ ENGINEERED SOLUTION

Crane class, capacity and bay spacing are fixed with you at design stage; columns are stiffened and corbels shop-welded for the runway, and fatigue checks are part of the calculation package.

THE CHALLENGE

Production lines that must not be broken by columns

SJ ENGINEERED SOLUTION

Clear-span portal frames or multi-bay layouts follow the line drawing from your production planner, so column positions never cut a conveyor, a robot cell or a forklift route.

THE CHALLENGE

Heat, fumes and noise over the machines

SJ ENGINEERED SOLUTION

Roof ventilators, louvres and skylights are located and sized at design and supplied with the envelope, so extraction and daylight arrive with the cladding rather than as a retrofit.

THE CHALLENGE

Plants that will grow after the first phase

SJ ENGINEERED SOLUTION

Frames are detailed for future bays and end-wall extensions, with splice positions and foundation provisions agreed in the first contract so expansion does not stop production.

How Your Project Is Built

Three phases from the first drawing to handover. Move over a phase to see what happens in it and what you receive at the end of it.

PHASE 01 / PRE-CONSTRUCTION

Engineering & Foundation

The structure is sized in a 3D BIM model before any steel is cut. While members are fabricated in the factory, earthworks and independent foundations are poured on site in parallel from the anchor bolt templates we ship first.

PHASE 02 / CONSTRUCTION

Fabrication & Erection

Columns, beams and trusses are CNC-cut, welded, tested and trial-assembled in the yard, then shipped in erection sequence. On site the frame is bolted from marked members with the erection drawings and our remote or on-site guidance.

PHASE 03 / COMPLETION

Envelope & Handover

Cladding, insulation, openings and rainwater goods close the building; dimensional and coating records are handed over with the as-built drawings and the certificate package.

CERTIFICATIONS & COMPLIANCE

Certifications & Compliance

Every shipment leaves with the documents an auditor asks for. Scroll the row and open any certificate at full size.

China Steel Structure Manufacturing Grade I

AISC Certification

CE Marking – EN 1090-2 (CPR 01627)

OTC Document of Validity

International Welder Certification

Enterprise Qualifications Portfolio

DG Packaging Certificate

Labor & Scaffolding Contracting

Explosion-Proof Certificate

Industrial Pipeline Installation GC1

Power Facility License

Technical Parameters

What the structure is sized from, and what is fixed before fabrication.

ParameterWhat it is set from
Building formatLarge-footprint portal frames and multi-storey frames with composite floors, following the process layout
Equipment and service loadsEquipment positions and weights, piping, ducting and cable tray loads taken from the process layout
EnvelopeCleanroom-compatible sandwich panels with supplier-declared U-value and fire class; openings with the maker’s declared performance classes
Heavy sectionsBox and cruciform columns welded on submerged-arc lines, critical full-penetration welds 100% UT or MT tested
Site loadsWind, snow and seismic loads calculated for the site location to the design code your project specifies
Execution classEN 1090-2 EXC2 (certificate 2787-CPR-01627)
Steel gradesS355 / S460 to EN 10025, ASTM A36 / A992, with EN 10204 type 3.1 mill certificates traced to heat number
Lead time40 to 50 days for a typical single-building portal frame scope: 1–2 weeks to shop drawings for your approval, then 4–5 weeks for fabrication, coating and loading; larger or multi-building projects are phased by building
DocumentationMTRs, WPS/PQR, welder certificates, NDT and DFT reports, erection drawings and the certificate package with every shipment

Recommended Product Systems

The structural systems we fabricate most often for this kind of project. Each opens the product page with sub-systems, parameters and FAQ.

Multi-storey steel buildings from one fabricator: thick-web H and box columns, cruciform columns, steel floor beams, composite decking and stairs for commercial and industrial frames, with embedded parts and anchor bolts shipped ahead of the steel.

Pre-engineered buildings on a steel portal frame, the rigid frame building type of every PEB catalogue: tapered H-section primary frames, cold-formed purlins, bracing and anchor bolts detailed as one system for workshops, warehouses and agricultural halls.

Steel truss structures for long-span roofs: circular pipe trusses, square tube trusses, angle steel trusses and H- or I-beam trusses fabricated as roof truss systems for terminals, stations, industrial halls and exhibition centres.

Building envelope systems quoted with the steel frame: roof and wall cladding, insulation and waterproofing, industrial doors, windows, louvers and ventilators, gutters and downspouts.

Frequently Asked Questions

Do you design the dry room or cleanroom?

No. We fabricate the frame and supply a cleanroom-compatible envelope with declared performance; dry-room HVAC, pressure regimes and process design stay with your process engineer, and we detail the structure to that design.

Yes, when the equipment positions and weights are in the design. Floor beams, decking and columns are sized to those loads and the composite floor is detailed with the frame.

Critical full-penetration welds are made to qualified procedures and 100% UT or MT tested, with a report per member issued before painting.

Yes, if the phasing is planned at design. End frames and foundations are detailed for the next phase so later bays bolt to the existing steel.

Typically 40 to 50 days for a single-building scope; large multi-building plants are phased by building with shop drawings issued per phase for your approval.

Design intent to AISC 360 or EN 1993 as your engineer specifies; execution to EN 1090-2 EXC2 under certificate 2787-CPR-01627, with AISC certification.

REQUEST A QUOTE

Send Us Your Drawings or BOQ

Tell us the footprint, span, crane capacity and local loads — our engineering team reviews every request and replies with a preliminary assessment.

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