26-Story Tower Built in 5 Days with Snap-Together Modules

Workers in Changsha, China watched flatbed trucks arrive on a snowy January morning carrying what looked like giant shipping containers. Five days later, they were handing keys to residents of a brand new 26-story apartment tower.

BROAD Sustainable Building just proved that modular construction can work at heights once thought impossible. Their Jindu Holon Tower went from empty lot to move-in ready in the time it takes most construction sites to pour a foundation.

The company's journey started with tragedy. A devastating 2009 earthquake in China's Sichuan province killed tens of thousands and toppled concrete towers like dominoes. BROAD's founder watched the disaster unfold and decided the construction industry needed a complete rethink.

Their solution sounds almost too simple to work. Factory workers spend 21 days building stainless steel modules that measure about 40 feet long. Each box arrives at the site already packed with plumbing, windows, lighting, HVAC systems, and kitchen cabinets.

Cranes stack them like blocks. Workers bolt them together. No concrete mixing, no welding, no waiting weeks for materials to cure in the sun and rain.

The secret is a patented stainless steel "sandwich" called B-CORE. It bends instead of breaks during earthquakes, solving the exact problem that inspired the technology. The material also laughs off corrosion and weather damage that forces expensive concrete renovations within seven years.

Andrew Zimman from BROAD Group USA says they're the first company to use stainless steel for load-bearing structures. "The mechanical properties weren't limited to corrosion resistance," he explains. "Stainless steel also had great ductility."

The system keeps improving. Early models required on-site beam installation. Now the beams integrate into the floor modules before they leave the factory. Zero welding needed at the construction site.

The Ripple Effect

Traditional construction clogs city streets for years with concrete trucks and disrupts entire neighborhoods. BROAD's method cuts that chaos down to days while eliminating the worker safety risks that compound over months of exposure to weather and heavy machinery.

The environmental win gets even better at end-of-life. When the building's usefulness ends, crews simply unbolt it, unstack it, and truck it away. No demolition dust, no landfill waste, no excavators burning fuel for weeks to clear rubble.

City planners dealing with changing zoning laws now have flexibility they never imagined. Insurance companies can recalculate risk knowing buildings can relocate if flood zones shift or earthquake data changes.

BROAD already has projects planned for Ohio, Texas, California, the Philippines, and the United Arab Emirates. Like the great suspension bridges that proved stainless steel's strength, there's no clear height limit for these structures.

The same material properties that let bridges span miles suggest these modular towers could keep climbing as long as engineers can design them and cities need them.