Construction Costs for Pre-Engineered Steel Buildings [2026] No. Item Quantity Unit Cost (VND) 1 Steel frame (columns, rafters) 5,000 m² 2,750,000,000 2 Bracing system 5,000 m² 550,000,000 3 Galvanized purlins 6,000 m² 720,000,000 4 Color-coated roofing sheet (0.50mm) 5,000 m² 800,000,000 5 Wall cladding (0.50mm) 500 m² 80,000,000 6 Double-sided aluminum foil insulation 5,000 m² […]