The Load-Bearing Trinity: Composite Action Engineering
Structural Synergy System:
Material Science Specifications:
| Componente | Especificación | Test Standard | Significance |
|---|---|---|---|
| Steel Core | G550 AZ150 | ASTM A792/A792M | Tensile strength 550MPa |
| Coating Weight | AZ150 | EN 10346 | 150g/m² zinc-aluminum |
| Yield Strength | 550 MPa | ISO 6892-1 | Deformation resistance |
Static Load Performance: Snow & Equipment
Certification Milestones:
- UL 580 Wind Uplift Class 120
- ASTM E1592 Severe Weather Rating
- Passed 300psf static load (exceeds most building codes)
- FM Global 1-90 Approval
Dynamic Load Resistance: Wind & Impact
Hurricane Simulation Data:
Impact Test Performance:
| Impact Energy | Resultado | Real-World Equivalent |
|---|---|---|
| 110 ft-lbs | No rupture | 2×4 lumber @ 100mph |
| 170 ft-lbs | Minor dent | Hailstone @ 4″ diameter |
| 240 ft-lbs | Controlled failure | Tree limb @ 50lbs |
Geometric Engineering: The Arch Principle
Profile Design Mechanics:
Span Performance Comparison:
| Spacing | Traditional Tile Max Span | SKW Max Span |
|---|---|---|
| 16″ o.c. | 8′-0″ | 14′-6″ |
| 24″ o.c. | Not recommended | 10′-9″ |
| 32″ o.c. | Prohibited | 8′-4″ |
Fastening Technology: Hidden Clamp System
Mechanical Interlock Advantage:
Resistencia al levantamiento por viento:
| Installation Type | Failure Pressure | Mejora |
|---|---|---|
| Exposed Fastener | 90 psf | Línea de base |
| Hidden Clip System | 300 psf | 233% |
Case Study: Extreme Snow Load Performance
Proyecto: Alpine Resort, Swiss Alps
Desafío: 400cm annual snowfall + 120mph winds
Solución SKW:
Métricas de rendimiento:
- Sustained 290psf snow load (3× local code)
- Zero deformation after 15 freeze-thaw cycles
- Maintenance cost reduction: 75% vs traditional roofs
Thermal Load Management
Expansion Control Technology:
Movement Measurements:
| Temp Delta | Movement per 10ft | Conventional Roof | SKW System |
|---|---|---|---|
| 100°F | 0.45″ | Buckling damage | Zero stress |
| 150°F | 0.68″ | Seal failure | Controlled motion |
Seismic Performance
Earthquake Simulation Data:
| Magnitude | Displacement | Resultado |
|---|---|---|
| 6.0 Richter | 3.5″ lateral | No damage |
| 7.2 Richter | 8.7″ lateral | Minor clip deformation |
| 8.0 Richter | 12.0″ lateral | Repairable damage |
Unique Feature:
- Self-realigning clip system
- Ductile steel deformation before failure
- Non-brittle stone coating
Installation Load Considerations
Walking Safety System:
Load Distribution Technology:
- Reinforced rib walking paths
- Anti-slip granule technology
- Point load spreader plates
Load Testing Methodology
Certification Process:
Testing Equipment:
- 400,000 lb hydraulic load frame
- 8×8 ft wind tunnel nozzle
- Accelerated weathering chamber
Structural Calculation Guidelines
Engineering Formulas:
SKW Performance Coefficients:
| Parámetro | Value | Ventaja |
|---|---|---|
| E (Elastic Modulus) | 203 GPa | 3× concrete |
| I (Moment of Inertia) | 0.89 in⁴/ft | 40% increase |
| Allowable Stress | 345 MPa | 28% higher |
Degradation Factors:
- Corrosion resistance maintains steel integrity
- UV-stable coatings prevent embrittlement
- Non-absorbent materials prevent freeze damage
Technical Documentation
Certifications: UL 580 • FM 4471 • ASTM E1592 • ICC-ES AC438 • CE EN 15601
SKW roofs are engineered to withstand nature’s most extreme forces – from Alaskan snow loads to Caribbean hurricanes. Our composite structural system delivers 2-3× the load capacity of traditional roofing, verified by independent laboratories and real-world performance in the world’s most demanding environments.