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Light Steel Villas
Light steel villas framed in cold-formed light-gauge steel to EN 1993-1-3: wall and roof panels roll-formed and punched to the house drawings, with the envelope build-up, doors and windows supplied as one package. For low-rise residential and accommodation where a light frame and fast dry assembly suit the site.
Light-gauge framing suits low-rise residential and accommodation loads at lower weight and faster assembly than a hot-rolled frame. Wall studs, tracks, roof trusses and floor joists are roll-formed and punched to the house drawings, then assembled into panels or shipped as marked members.
The wall and roof build-up — sheathing, insulation, membranes, cladding and lining — is supplied with the frame, with the supplier-declared fire reaction class and insulation performance for the build-up chosen. Doors and windows come with the maker’s declared performance classes.
Part of Light Gauge Steel Solutions in Prefabricated & Modular Housing .
Technical Specifications
| Item | Specification |
|---|---|
| Design basis | EN 1993-1-3 (cold-formed thin-gauge members); AISC 360 where the project specifies US codes |
| Material | Galvanised strip to ASTM A653 or the EN equivalent, coating class on the certificate |
| Framing | Studs, tracks, joists and roof trusses roll-formed and punched to the drawings |
| Envelope | Build-up with supplier-declared fire reaction class and insulation performance |
| Openings | Doors and windows with the maker’s declared performance classes |
| Documentation | Material certificates, makers’ performance declarations and assembly drawings with every shipment |
Section sizes, grades and quantities for this product are issued with the quotation once your design basis and loads are received.
Advantages vs Engineering Considerations
| Advantages | Engineering Considerations |
|---|---|
| Light frame, fast assemblyCold-formed framing weighs less than hot-rolled steel and is assembled dry with screws and bolts. | Module dimensions are limited by road and container transport; larger rooms need multi-module joins. |
| Frame and envelope togetherSheathing, insulation, membranes, cladding and lining are quoted with the frame, so the junctions are engineered rather than left between suppliers. | Light-gauge frames suit low-rise use; stacking height and seismic zone limit the system. |
| Declared performanceFire reaction class and insulation standard are declared for the build-up chosen; doors and windows carry the maker’s performance declaration. | Services and finishes are fitted in the factory, so late design changes are costly. |
| Documented assemblyPanel layout, marking plan and assembly drawings travel with the consignment. | Foundation level and site access decide how quickly modules can be set. |
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
Have drawings or a BOQ ready? Send them through the form and our engineers reply with a preliminary assessment.
Related Projects
Steel structures we fabricated and shipped for the same kind of building.
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SynJect ENGINEERING
From Microns to Megastructures — 12 Rigorous Stages Certified to AISC & EN 1090
Detailed Engineering & Shop Drawing Development
Utilizing advanced BIM platforms such as Tekla Structures, detailed 3D modeling and shop drawings are executed strictly in compliance with AISC 360 or Eurocode 3 (EN 1993). Connection designs are rigorously verified, with manufacturing drawings generated to ISO 2768-m tolerance standards. 100% clash detection with primary architectural and MEP systems is performed to ensure zero structural conflicts during field erection.
Nesting & Material Optimization
Intelligent nesting layouts are performed using advanced software like FastCAM/SigmaNEST in accordance with EN 10029 / ASTM A6 dimensional standards. Accounting for cutting kerf (2mm-5mm depending on plate thickness) and thermal contraction allowances, raw material utilization exceeds 92%. Offcuts are digitally barcode-tracked to ensure 100% mill test report (MTR) traceability.
Raw Material Incoming Inspection
All structural steel (Q355B/C/D, ASTM A572 Gr.50, S355JR/J2) must be accompanied by EN 10204 3.1 Mill Test Reports (MTR). Incoming quality control conducts 100% dimensional and visual inspections under ASTM A6 / EN 10029, verifying thickness tolerances (Class A/B) and internal lamination integrity via Ultrasonic Testing (UT) to ASTM A435. Chemical composition and mechanical properties are spot-verified by accredited 3rd-party labs.
CNC Cutting & Edge Preparation
Plate profiling and component cutting are executed via CNC oxy-fuel, high-definition plasma, and multi-kW fiber laser equipment. Cut surface quality strictly complies with EN ISO 9013 for perpendicularity and surface roughness (Range 3/4 tolerance). Multi-axis CNC beveling machines execute weld prep bevel angles within ±2.5° and root face dimensions within ±1.0 mm.
Primary Structural Welding
Welding is performed exclusively by AWS D1.1 or EN ISO 9606 certified welders using qualified Welding Procedure Specifications (WPS) supported by Procedure Qualification Records (PQR) per AWS D1.1 / ISO 15614. Submerged Arc Welding (SAW) and Flux-Cored Arc Welding (FCAW) dominate Complete Joint Penetration (CJP) and fillet welds. Heat input is strictly controlled, achieving weld quality levels conforming to ISO 5817 Quality Level B or AWS D1.1 standards.
Weld Distortion Straightening
Post-weld angular distortion, camber, and sweep are rectified using automated hydraulic flange straighteners and controlled thermal flame straightening. Heating temperatures for High-Strength Low-Alloy (HSLA) steels are strictly maintained between 600-650 Celsius (air-cooled, zero water quenching) to prevent microstructural degradation. Post-straightening straightness tolerances meet ±3 mm, conforming to EN 1090-2 Execution Class 2 (EXC2) and AISC COSP standards.
Non-Destructive Testing (NDT)
NDT protocols are operated by ISO 9712 / ASNT Level II certified NDT personnel. 100% of critical Complete Joint Penetration (CJP) welds undergo Ultrasonic Testing (UT per ISO 17640 / ASTM E164) or Magnetic Particle Testing (MT per ISO 17638 / ASTM E709). Radiographic Testing (RT) is applied as requested for heavy sections. Weld acceptance conforms strictly to ISO 11666 Acceptance Level 1 or AWS D1.1 criteria.
Trial Assembly & Shop Alignment
Complex geometries, long-span trusses, and heavy framing undergo 1:1 physical trial assembly or high-precision 3D laser scanning virtual assembly per EN 1090-2 / AISC requirements. Bolt hole alignment is verified (≥95% free-pass rate for high-strength bolts), and critical dimensions (span, camber, 3D spatial alignment) are verified within tight tolerance limits (±2.0 mm) to eliminate site fitting risks.
Surface Preparation & Protective Coating
Structural members undergo automated shot blasting to achieve SSPC-SP10 / NACE No. 2 / ISO 8501-1 Sa 2.5 cleanliness, with a surface profile (anchor depth) of 45-75 microns. High-performance protective coatings are applied using airless spray technology in compliance with ISO 12944 (C3 to CX corrosive environments), featuring Zinc-Rich Epoxy Primers, Epoxy Micaceous Iron Oxide Intermediate coats, and Polyurethane/Fluorocarbon Topcoats. Dry Film Thickness (DFT) is verified adhering strictly to the 90/10 rule.
Final Quality Inspection & Certification
Final Quality Control (FQC) performs a comprehensive audit, inspecting paint aesthetics (zero runs, pinholes, sagging), critical geometry, bolt hole pitches, and component mark traceability. A complete Manufacturing Data Report (MDR) comprising MTRs, NDT records, coating inspection logs, and Certificates of Conformance is compiled to support CE Marking (DoP under EN 1090) and AISC final acceptance.
Export Packaging & Logistics Protection
Protective packaging is engineered for containerized (40HQ/OT/FR) and breakbulk ocean freight under heavy maritime transit conditions. Structural members are bundled on heavy-duty steel skids with high-tensile steel strapping. Machined connections are wrapped with VCI anti-corrosion film, EPE foam padding, and heavy rubber cushions. All timber packing complies fully with ISPM 15 phytosanitary standards and IMO Cargo Stowage and Securing (CSS) rules.
Global Field Erection & Site Management
We deliver international site erection supervision and turnkey EPCM construction services adhering to OSHA 1926 safety protocols, AISC COSP, and EN 1090-2 erection standards. Field teams, led by multilingual HSE and QA/QC engineers, utilize high-precision total stations to maintain structural plumbness within H/1000 (25mm max). High-Strength Structural Bolting is executed via calibrated Wrench or Turn-of-Nut methods with 100% torque audit documentation.
Frequently Asked Questions
What is the difference from a hot-rolled steel frame?
Light-gauge cold-formed framing to EN 1993-1-3 suits low-rise residential and accommodation loads at lower weight and faster assembly. It is not a substitute for a hot-rolled frame under crane or heavy industrial loading — if your loads are in that range we quote the multi-storey line instead.
Do you supply the wall and roof build-up with the frame?
Yes, as one package, with the supplier-declared fire reaction class and insulation performance for the build-up chosen. Frame and envelope from one source removes the interface risk at the junctions.
Can you build to our house plans?
Yes. Send the architectural plans, the site location for wind and snow loads and the envelope you intend to use; the framing is detailed to them and the panel layout comes back with the quotation.
How is a light steel villa shipped?
As framed panels or marked members with the envelope materials, doors and windows in the same consignment, packed with edge protection and a numbered assembly sequence.
What is a realistic lead time?
Confirmed at quotation for the floor area and envelope specification. As a reference, a single-building portal frame scope runs 40 to 50 days from contract to loading; villa kits are scheduled by batch.
What is included in a unit as delivered?
The scope is agreed in writing before production — typically the steel frame, envelope build-up, doors, windows, internal lining, electrical conduit and sanitary provision. Anything outside that scope is listed explicitly in the quotation rather than assumed.
Do the units meet local building regulations at destination?
We build to the standards you specify and supply the frame calculations and the envelope makers’ performance declarations for your local engineer to submit. Local approval remains with your side; we provide the documentation it needs.
How are they transported?
As complete units where dimensions allow, otherwise flat-packed with a numbered reassembly sequence, service connection diagrams and a spare parts kit.
What is the fire and thermal performance?
Declared by the panel and insulation makers for the build-up chosen — fire reaction class and thermal performance of the core. State the required class and we propose a build-up that meets it.
What is a realistic lead time?
Typically 40 to 50 days for a standard scope: 1–2 weeks to layout drawings for your approval, then 4–5 weeks for framing, envelope, fit-out and loading.
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.
- Reviewed by our engineering team
- AISC certified · CE marked EN 1090-2 (EXC2)
- Mutual NDA available on request
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