Q1: Why are curtain walls aluminum-dependent?
Thermally broken profiles (0.7-2.0 W/m²K) enable all-glass facades. Structural silicone glazing eliminates external mullions. Unitized systems allow 50 m²/day installation speed. Burj Khalifa used 34,000 tons of aluminum for cladding.
Q2: How does aluminum reduce building carbon footprint?
Recycled-content extrusions (75%+ post-consumer) cut embodied carbon by 85%. Photovoltaic-integrated panels generate 35 kWh/m²/year. Phase-change material (PCM) cores regulate temperatures passively.
Q3: What innovations exist for roofing systems?
Cool-roof coatings with 0.85 solar reflectance reduce cooling loads by 30%. Standing-seam roofs span 100+ meters without supports. Integrated snow-melting systems prevent ice dam formation.
Q4: How is aluminum used in modular construction?
Prefabricated bathroom pods with extruded frames cut onsite time by 70%. Interlocking floor systems carry 500 kg/m² loads. Demountable partitions enable 90% reuse during renovations.
Q5: What are fire safety considerations?
Alloy 6061 retains 50% strength at 300°C versus steel's 20%. Intumescent coatings expand at 200°C to insulate structural members. Cavity barriers prevent vertical flame spread.
