Light-gauge steel villas are a low-rise residential building system centered on light-gauge steel framing-formed through the cold-rolling of hot-dip aluminum-zinc-coated steel strips. The coating, composed of 55% aluminum, 43.4% zinc, and 1.6% silicon, forms a quaternary crystalline structure at 600°C that provides an effective anti-corrosion barrier.
The structure comprises four major systems-foundation, walls, floors, and roofing-utilizing factory-prefabricated components assembled on-site. Its dead weight is merely one-fifth to one-eighth that of traditional structures; exterior walls are insulated with glass fiber wool and regulated by breathable membranes for moisture control. Employing standardized, modular construction techniques, the main structure withstands magnitude-9 earthquakes and level-12 winds. Compared to traditional construction, the build time is reduced by 50%, material waste drops to 3%, and overall costs are 15%–20% lower than brick-concrete structures. Exterior finishes include options such as carved metal panels and fiber-cement siding, while the roofing system supports integrated photovoltaic tiles, enhancing energy efficiency by 40%. Applications range from rural housing and tourist resorts to overseas projects, with twenty-eight provinces having already introduced subsidy policies for prefabricated construction to drive industry growth.
