Aluminium vs GI Structure Calculator
Evaluate static roof loads, estimated material lifespans, and structural engineering recommendations comparing Extruded Aluminium and Hot-Dip Galvanized Iron (GI) racking.
1 Project Parameters
2 Structural Engineering Analysis
Static Dead Load comparison
Aluminium Mini-Rails Recommended
For trapezoidal metal rooftops in dry climates, extruded aluminium profiles are highly recommended. This prevents roof overloading while keeping installation speeds high.
Engineering Guidelines: Aluminium vs GI Steel
Selecting the correct mounting material dictates the structural integrity and financial pay-back of your solar system. Below is an engineering comparison from SOLBE's research laboratory in Trichy.
Extruded Aluminium (AA 6063-T6)
Aluminium profiles are extruded and then anodised to form an oxidation barrier. Advantages include:
- Zero Maintenance: The anodised layer (minimum 15 microns) prevents corrosion without needing paint or reapplied coatings.
- Weight Reduction: 65% lighter than steel, crucial for lightweight corrugated asbestos or tin roofs.
- Galvanic Isolation: Aluminium matches the module frames, eliminating electrical potential differences.
Hot-Dip Galvanized Iron (GI)
GI structural steel is roll-formed and then dipped in molten zinc. Essential highlights:
- High Structural Strength: High yield strength (IS 2062) ideal for massive ground-mount wind sails.
- Heavy Zinc Coating: Must be hot-dip galvanized in compliance with IS 2629 and IS 4759 standards to survive damp outdoor farm soils.
- Rigidity: Exhibits less deflection over high spans, allowing longer intervals between structural columns.
Link & Cite This Engineering Utility
Using this calculator in your structural designs, project proposals, or website content? Citing this tool verifies design assumptions for site inspectors, EPC audits, and clients.