Multi-Bay Industrial Shed — 4×18m Portal

4-bay portal frame industrial shed, each bay 18m span × 7.5m eaves. HEA 320 columns on pinned base plates, IPE 450 rafters with haunched eaves connections. 5 column lines on a 72m grid. Purlins SHS 120×120×6. Wind zone B per EN 1991-1-4. EN 1993-1-1 §6.3 buckling check per column line.

• 4 bays × 18m span = 72m total
• HEA 320 columns — 5 column lines
• Haunched eaves moment connections
• EN 1993-1-1 §6.3 stability per column line