PEB Systems (Pre-Engineered Buildings)
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. Quoted from your span, bay spacing, crane duty and local wind and snow loads, fabricated to AISC 360 or EN 1993 and executed under EN 1090-2 EXC2. The Portal Frame Structure page covers the complete building.
What This System Includes
The component families we fabricate in-house for this product line. Send a BOQ and we quote against these directly.
H-Section Columns · Box / Rectangular Columns · Cruciform Columns · Circular Columns …
Z-Section Purlins · C-Section Purlins · Rectangular Purlins · High-Frequency Welded H-Purlins …
Technical Specifications
| Item | Specification |
|---|---|
| Design basis | AISC 360 / EN 1993, as the project specifies |
| Execution class | EN 1090-2 EXC2 (certificate 2787-CPR-01627) |
| Steel grades | S355 / S460 to EN 10025, ASTM A36 / A992, with EN 10204 type 3.1 mill certificates traced to heat number |
| Secondary members | Cold-formed Z, C and channel purlins to EN 1993-1-3 / ASTM A653 |
| Welding | AWS D1.1 / EN ISO 9606 qualified procedures and welders; built-up sections on submerged-arc lines |
| NDT | 100% UT or MT on critical full-penetration welds to ISO 11666 / AWS D1.1 |
| Site bolting | HSFG assemblies to EN 14399 / ASTM F3125, tightened by torque or turn-of-nut method with 100% torque audit records |
| Corrosion protection | ISO 12944, system selected per site environment (C3–CX) |
| Documentation | MTRs, WPS/PQR, welder certificates, NDT and DFT reports with every shipment |
Project-specific tolerances, section sizes and load tables are issued with the quotation once your design basis is received.
Advantages vs Engineering Considerations
| Advantages | Engineering Considerations |
|---|---|
| Portal frame designed to your loadsTapered H-section rafters and columns are sized from your span, bay spacing, crane duty and the wind and snow loads of the site, to AISC 360 or EN 1993. The design basis is stated on the drawings you approve. | Best suited to single-storey and low-rise buildings; multi-storey floors or heavy mezzanines call for a braced or moment frame instead. |
| Dual certificationAISC certified and CE marked to EN 1090-2 EXC2 under certificate 2787-CPR-01627, so one fabricator satisfies a US-code or a Eurocode specification with the documentation each inspector expects. | Column-free spans increase rafter depth and foundation reactions; very long spans may be more economical as trusses or space frames. |
| All-bolted site assemblyPrimary frames, purlins and bracing arrive drilled and match-marked for bolted erection. No site welding is required for the structural frame, which keeps the erection crew and the schedule small. | Frames are sized to the stated crane duty and loads; a later change of crane class or roof equipment needs a design check. |
| Freight engineered in3D load simulation before cutting; members over 12 m are split at bolted splices to fit 40HC containers. The container count is fixed during detailing, not at booking. | Cold-formed purlins and girts reach their design capacity only with correct cladding fixing and bracing. |
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.
SynJect. Scale. Precision. Certainty.
SYNJECT delivers comprehensive steel structure solutions engineered for the global value chain. From investors seeking ROI to engineers demanding exact compliance, we transform complex blueprints into robust realities—on time and without friction.
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
Is a steel portal frame the same as a pre-engineered building?
In our scope, yes. A pre-engineered building (PEB) is a portal frame structure whose primary frames, purlins, bracing and connections are engineered and fabricated as one kit. The Portal Frame Structure page covers the complete building; this page lists the sub-systems and components we also quote separately.
Do you quote portal frame buildings without drawings?
Yes, from the footprint, eave height, span, crane capacity and site location. Our engineers issue a preliminary BOM and tonnage; full shop drawings follow once the design basis is agreed.
Which design code do you fabricate to?
Whichever your design specifies. We work to AISC 360 or Eurocode 3 (EN 1993) for design intent, and execute to EN 1090-2 EXC2 under certificate 2787-CPR-01627. State the code in your enquiry and the quotation is issued against it.
Can you issue calculations our building authority will accept?
Yes. We provide English structural calculation reports with load combinations and 3D models. Where local regulations require a licensed local engineer to stamp the drawings, we supply the calculation package for their review.
What is a realistic lead time?
For a typical single-building scope the standard cycle is 40 to 50 days: 1–2 weeks from contract to 3D models and shop drawings for your approval, then 4–5 weeks for procurement, CNC fabrication, welding, coating and loading. Drawing approval is the part you control.
Do you supply the enclosure as well as the frame?
Yes. Roof and wall cladding, insulation, waterproofing, doors, windows, ventilation and drainage are quoted as one package — see Enclosure & Cladding Systems . Single-source supply removes the interface risk between frame and envelope.
How do we verify your certificates?
Ask us for the certificate together with its Document of validity — they are issued as an inseparable pair. We send both with the welding annex on request. Details are published on our certificates page .
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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