Lightweight steel frame construction in Australia
As early as the 1960s, Australia put forward the concept of "rapid installation of prefabricated houses". However, due to the immature market, Australia has not been well developed. By 1987, the appearance of high-strength cold-formed thin-walled steel structures appeared in Australia and New Zealand's joint specification AS / NZS4600 cold-formed steel specification was released in 1996. This kind of steel has a high bearing capacity, which is only 1/3 of the weight of wood compared with the same carrying capacity of wood. The surface is galvanized and the durability can reach 75 years without major overhaul. In Australia, about $ 600 million of light steel keel detached houses are built each year, amounting to 120,000, accounting for about 24% of Australia's total construction output.