Light Gauge Steel Framing (LGSF) • Eurocode Design & CNC Manufacturing

Light Gauge Steel Floor Joist & Cassette Systems

Engineered cold-formed steel C-joists and open-web floor trusses designed for high acoustic isolation, vibration damping, and long clear spans.

Steel Metallurgy S350GD + Z275 Structural Steel
Design Standards Eurocode 3 & 8 • EN 1090-2 EXC3
Manufacturing < 0.5 mm CAD/CAM • 100% Pre-Punched
Field Erection 100% Bolted • Zero Site Welding
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Eurocode 3 & 8 Certified Engineering
EN 1090-2 Factory Quality Control
40ft HC Container Packing & Flat-Pack Export
100% Bolted Field Assembly (Zero Site Welding)

Master Engineering Specification & Metallurgy

Precision manufacturing parameters, steel grades, connection hardware, and performance metrics.

Profile Geometries & Raw Metallurgy

Profile Geometries & Section Dimensions: C-Joists 150mm to 300mm depth, Open-Web floor trusses up to 400mm depth
Structural Steel Grade & Yield Strength: S350GD + Z275 Structural Steel
Corrosion Protection & Surface Treatment: Hot-dip continuous galvanizing Z275/Z350 (EN 10346) or batch galvanizing per ISO 1461 (min 85 µm) & SA 2.5 shot-blasting with 2-pack epoxy primer for C1 to C5-M corrosivity.
Fasteners & Bolted Connection Hardware: High-strength structural bolting sets Grade 8.8 / 10.9 per EN 14399 / EN 15048 and corrosion-resistant bi-metal self-drilling fasteners.

Building Physics & Export Logistics

Fire Resistance & Acoustic Performance: L n,w < 55 dB impact sound isolation with resilient channels and acoustic screed
Thermal Performance & U-Values: U-values from 0.22 down to 0.11 W/m²K engineered with continuous external insulation and thermal break isolators (GEG / RE2020 / Passivhaus).
Export Delivery & Container Packing: Individual pre-cut joists or factory-prefabricated floor cassettes
Serviceability Deflection Limits (SLS): Strict deflection limits from L/300 to L/500 preventing cracks in architectural cladding and interior drywalls.

Structural Mechanics, Load Paths & Finite Element Modeling

How vertical gravity, lateral wind, and seismic forces are dissipated through our engineered framing.

1. Vertical Gravity Load Transfer

Floor live loads (2.0 to 7.5 kN/m²) are carried by deep cold-formed C-joists or open-web steel floor trusses spanning up to 8.5 meters clear. Dynamic footfall vibrations are suppressed through engineered solid steel web stiffeners and continuous underside drywall ceiling decoupling.

2. Lateral Wind & Seismic Ductility

Horizontal floor diaphragm action is established via structural floor boarding (oriented strand board or cement-bonded particle board) screwed directly to the joist top flanges, transferring seismic and wind shear forces into perimeter load-bearing walls.

3. Thermal Break & Moisture Control

Impact acoustic performance achieves Ln,w < 48 dB through resilient acoustic underlays and wet or dry screed floating floor assemblies. Infilled acoustic mineral wool dampens airborne sound transmission across residential levels (Rw > 56 dB).

European Eurocodes & Global Standards Compliance

Fully verified structural calculations meeting European, British, and international building codes.

EN 1993-1-3

Floor Joists

Bending moment and shear capacity verification of thin-walled joists with service cutouts.

EN 1990 Annex A1

Vibration Limits

Footfall dynamic response and deflection checks strictly limited to L/450 or 5mm max.

EN ISO 717-2

Impact Sound

Laboratory-verified weighted impact sound reduction for multi-family party floors.

EN 1365-2

Fire Resistance

REI 60 to REI 90 load-bearing fire resistance with double ceiling fireboard linings.

End-to-End CNC Fabrication to Job-Site Assembly Lifecycle

From 3D Tekla BIM modeling to automated roll-forming, container packing, and on-site bolted erection.

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3D Joist Web Optimization

Parametric spacing and cutout alignment for HVAC ductwork and plumbing runs.

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CNC C-Joist Profiling

Precision roll-forming of 150mm–300mm depth joists with pre-cut tabs and end flanges.

03

Pre-Assembled Floor Cassettes

Factory assembled into 2.4m x 7.5m floor cassettes for instant crane drop-in or flat-pack shipment.

04

Rapid Bolted / Screwed Erection

Fast interlocking into wall perimeter track channels with heavy-duty structural screws.

Key Engineering & Commercial Advantages of this System

Why civil engineers, architects, and international contractors specify this SerBuild technology.

Zero Creep or Floor Squeaks

Steel joists eliminate floor creaks, seasonal shrinkage, and joist warping permanently.

Integrated HVAC Web Openings

Open-web and punched C-joists conceal ductwork and pipes within floor depths.

Clear Spans up to 8.5 Meters

Long clear spans remove the necessity for intrusive interior load-bearing walls.

Superior Acoustic Privacy

Acoustic floating floors achieve Ln,w < 48 dB impact and Rw > 56 dB airborne ratings.

Compatible Building Solutions & Applications

Explore the primary architectural and industrial building types utilizing this structural system.

Warehouses & Logistics

Clear-span halls up to 60m+ span with optimized eave heights and overhead crane integration.

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Residential Villas & Housing

Modern 1 to 6-storey residential structures with superior acoustic privacy and seismic safety.

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Commercial & Data Centers

Heavy-duty framing for corporate offices, retail complexes, and mission-critical IT data centers.

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Agricultural & Equestrian

Corrosion-resistant equestrian arenas, grain storage halls, and ventilated livestock facilities.

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Engineering Deliverables Package Provided with this System

Complete technical documentation and models supplied for municipal permitting and construction.

1. 3D BIM & Structural Dossier

  • Tekla Structures 3D IFC Coordination Model
  • Eurocode 3 & 8 calculation dossier (PDF)
  • FEA joint and connection verification sheets

2. Foundation & Anchor Schedules

  • Precise anchor bolt coordinate layout drawings
  • Foundation reaction tables (Axial, Shear, Moment)
  • Anchor setting templates and detail cross-sections

3. 3D Erection Manual & Certs

  • Step-by-step 3D assembly and erection guide
  • EN 10204 Type 3.1 raw mill test certificates
  • CE Declaration of Performance & EU CBAM cert

Relevant Project References

Real-world evidence of precision Eurocode engineering, containerized export, and on-site assembly execution.

Split, Croatia Supply + Supervision

266 m² Contemporary Light Gauge Steel Villa in Split, Croatia

Challenge: Severe coastal bora wind gusts (up to 180 km/h) and high seismic ground acceleration in the Adriatic coastal z...

266 m² (2,863 sq ft) Case Study →
Bavaria, Germany Supply Only (Kit Package)

1,800 m² Clear-Span Steel Logistics Warehouse in Bavaria, Germany

Challenge: 30-meter column-free clear span required to maximize high-bay pallet racking, integrated with a 10-ton overhea...

1,800 m² (19,375 sq ft) Case Study →
Lyon, France Supply + Supervision

4,500 m² Logistics Distribution Center in Lyon, France

Challenge: 12 integrated loading docks, high internal clearance of 12 meters, strict NF EN French Eurocode compliance, an...

4,500 m² (48,438 sq ft) Case Study →

Frequently Asked Questions

Detailed answers to technical, manufacturing, export, and on-site assembly questions.

SerBuild designs and manufactures light gauge steel (LGSF) and heavy structural steel buildings for residential developments, industrial warehouses, manufacturing factories, aircraft hangars, commercial offices, and agricultural halls.

Yes. All structural engineering is performed strictly according to Eurocodes (EN 1990, EN 1991, EN 1993, EN 1998) including project-specific National Annex parameters for local snow, wind, and seismic loads.

We offer five flexible delivery packages: Engineering Only, Supply Only (containerized flat-pack kit), Supply with On-Site Supervision, Complete Frame Installation, and Turnkey Project Delivery in eligible regions.

Components are precision roll-formed or cut, permanent piece-marked, and packed in dense weather-protected flat-pack bundles optimized for 40ft High Cube containers, accompanied by detailed 3D packing lists and assembly manuals.

Submit your project location, building dimensions (width, length, eave height), intended use, and any available architectural drawings or sketches via our 5-step RFQ form. Our engineering team reviews the submission and responds within 24–48 hours.

Request an Engineered Steel Building Proposal

Submit your project dimensions, drawings or requirements for an engineering review and itemized quote within 24–48 hours.

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Step 1: What type of steel building are you planning?

Step 2: Project Location & Target Dimensions

Step 3: Preferred Delivery Scope & Engineering Equipment

Step 4: Project Schedule, Incoterms & Readiness

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