From Blueprint to Finished Building: 8 Phases of Steel Hall Construction
From the first phone call to handover of the finished building — here's how 800 m² of steel hall is created in 8 precisely coordinated phases.
Every prefab steel hall — from a discreet warehouse to an imposing industrial facility — is created through the same precisely orchestrated process. 8 phases. 65 days. Hundreds of coordinated steps.
Click through the holographic display below and follow how a 20×40 m hall — 800 m² of finished space — is built.
Phase 01 — Inquiry & Consultation (Day 1-3)
The investor describes needs: building purpose, approximate dimensions, location, budget. Our engineer contacts you within 2 hours. In the first meeting, we define the complete project brief.
| Parameter | Example for 20×40m hall |
|---|---|
| Span | 20 m (no internal columns) |
| Length | 40 m (8 bays × 5 m) |
| Height to eaves | 8 m |
| Purpose | Warehouse with loading dock |
| Envelope | PIR sandwich panels 60 mm |
| Corrosion category | C3 (industrial zone) |
Phase 02 — 3D Design (Day 3-10)
BIM model created in Tekla Structures. Every element — from the main beam to the last bolt — is modeled in 3D space. In parallel: structural calculation per Eurocode 3 including wind, snow, and seismic loads.
Phase 03 — Material Procurement (Day 7-14)
S355JR steel with 3.1 certificates (EN 10204). For a 20×40m hall: 35-45 tons of steel. CNC plasma/laser cuts profiles to ±1 mm tolerance.
Phase 04 — Fabrication & Welding (Day 14-35)
15+ certified welders (EN ISO 9606) in our facility. MAG 135/136 for thicker elements, TIG 141 for precision joints. Every weld inspected per EN ISO 5817 class B or C. NDT inspection: 100% visual + ultrasound on load-bearing joints.
Phase 05 — Anti-Corrosion Protection (Day 30-40)
For C3 category: hot-dip galvanizing 85 µm per EN ISO 1461. Elements are immersed in zinc at 450°C — protection penetrates into the steel. Thickness measured by ultrasound. Documentation for every batch.
Phase 06 — Transport (Day 38-42)
Elements are numbered and palletized in assembly sequence. Specialized truck transport. For this hall: 3-4 trucks.
Phase 07 — Assembly (Day 42-60)
Mobile crane up to 500 t. Team of 15+ assemblers. Sequence: columns → beams → secondary purlins → roof panels → wall panels → gutters, seals, doors. Geodetic control at every step.
Phase 08 — Handover (Day 55-65)
Touch-up AKZ. Cleaning. Final geodetic control. Handover report with complete documentation: