The construction industry is witnessing a revolution, and it's happening in China. In a remarkable feat of engineering, a 26-story residential tower was built in just five days in January 2024, challenging the conventional norms of construction. This rapid construction method, achieved by Broad Group Holon, raises intriguing questions about the future of building and the potential implications for the global construction market.
What makes this achievement even more fascinating is the use of a patented stainless steel sandwich structure called B-CORE. This innovative material, developed by Broad Group, offers corrosion resistance and superior mechanical performance under stress. The choice of stainless steel is particularly intriguing, as it allows the building to flex during seismic events, a crucial consideration in a country prone to earthquakes. The company's bold claim that the tower can last over 1,000 years is a testament to the material's durability and the company's forward-thinking approach.
The construction process itself is a marvel. Instead of traditional methods, Broad Group constructs the entire apartment in a factory, using prefabricated stainless steel modules. Each module is a 12-meter-long, 3-meter-high, 2.4-meter-wide unit, complete with electrical wiring, air conditioning piping, and interior finishes. This factory-based approach allows for rapid assembly, with one module being completed every 21 minutes, according to the Modular Building Institute.
The apartments are not just move-in ready but also feature high-tech amenities. Each 68-square-meter unit is equipped with four-paned windows for solar heat control, insulated exterior walls for noise reduction and heat retention, and an energy-recovery ventilation system based on passive house principles. The building's integrated water filtration system ensures that tap water is directly drinkable, addressing a common concern in many countries.
The implications of this rapid construction method go beyond the immediate achievement. The bolted connections used in the construction allow for the entire building to be dismantled, loaded onto trucks, and reassembled at a different site. This relocatable concept transforms a large residential asset into a flexible product, potentially changing the financial dynamics for governments and housing authorities. The idea of a building that can move with its inhabitants is a game-changer, especially in areas prone to zoning changes or infrastructure shifts.
Broad Group's success has sparked international interest. The company is expanding its modular construction model globally, with projects in Ohio, Texas, California, the Philippines, and the United Arab Emirates. The use of standard 40-foot shipping container footprints ensures that the modules can travel on flatbed trucks or container ships without special permits, making international transportation and assembly more accessible.
The future of construction may indeed be modular, with stainless steel at its core. As Sunny Wang, president of Broad Group USA, suggests, there is no theoretical height limit for modular construction with this system. The combination of speed, durability, and flexibility makes this approach increasingly attractive, potentially reshaping the construction industry and offering a more sustainable and adaptable solution for the future of building.
