Galvanized Corrugated Roof Sheet Product Overview
Galvanized corrugated roof sheets are zinc-coated steel panels featuring wave/trapezoidal patterns that enhance structural strength. With 60-275g/m² zinc layers (hot-dip or electroplated), these sheets prevent rust while maintaining 0.12-6mm thickness for versatile applications from barns to commercial complexes.
5 Key Advantages
- Superior Durability
- 35+ year lifespan with Z275 coating (ISO 3575 certified)
- Withstands 140km/h winds (EN 10143 wind uplift test)
- Lightweight Design
- 4.8kg/m² weight (0.5mm thickness) vs 42kg/m² concrete tiles
- Easy Installation
- Pre-punched holes every 600mm (AS 1397 compliant)
- Compatible with standard M6 roofing screws
- Aesthetic Flexibility
- Accepts PVDF/polyester coatings in 20+ RAL colors
- 100% Recyclable
- 85% recycled steel content (LEED v4.1 compliant)
Technical Specifications
| Parameter | Detail |
|---|---|
| Dimensions | 600-1500mm width × 1-12m length (customizable) |
| Coating Types | Zero/Normal/Large Spangle (ASTM A653) |
| Yield Strength | 220-550 MPa (S220GD to S550GD grades) |
| Corrosion Resistance | Salt spray 480-2000hrs (ISO 9227) |
| Thermal Expansion | 11.7 µm/m°C (20-100°C range) |
Material Comparison
| Feature | Galvanized Steel | Traditional Clay Tile |
|---|---|---|
| Weight | 5.2kg/m² | 42kg/m² |
| Installation Time | 150m²/day | 40m²/day |
| Lifespan | 35-50 years | 75-100 years |
| Cost (per m²) | 8.5−15 | 25−40 |
Installation Guide
- Slope Requirements
- Minimum 5° pitch for water drainage (BS 5534 standard)
- Fastening Protocol
- Use neoprene-washered screws every 3rd corrugation
- 10mm edge overlap for 600mm-wide panels
- Cutting Tools
- Nibbler/shear preferred (avoid angle grinders)
Environmental Recommendations
| Location | Zinc Coating | Additional Protection |
|---|---|---|
| Coastal | Z275 + PVDF | Silicone edge sealing |
| Industrial | Z180 + paint | Anti-chemical primer |
| Arctic | Z350 | Thermal break layer |
Maintenance Tips
- Annual Inspection: Check fastener tightness after first winter
- Cleaning: Soft brush + pH-neutral detergent (avoid abrasives)
- Repairs: Apply zinc-rich paint (≥94% Zn) to scratches
Why Choose Corrugated Sheets?
Compared to standing seam roofs, corrugated panels offer 40% lower material costs while providing equal wind resistance. The ribbed design increases load capacity to 1.5kN/m² (EN 1991-1-3 snow load standard).
Industry Fact: Over 60% of Australian farm buildings use Z275-grade corrugated roofing due to its hail resistance (AS 4046 Class 4).
Global Standards Cross-Reference:
| Standard | Equivalent Grades |
|---|---|
| ASTM A653 | DX51D (US), SGCC (JP) |
| EN 10346 | S320GD (EU), SGC490 (AS) |
| JIS G3302 | SGCD4 (Asia), Z450 (Oceania) |
Hot-Dip vs Electro-Galvanized:
- Hot-Dip: Thicker coating (Z275), better edge protection
- Electro: Smoother surface (Z60), ideal for pre-painting
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