Luyten turns a tower crane into a 3D printer, now capable of printing buildings up to 100 meters tall

Australian company Luyten has just unveiled the Ascend Series A27, a concrete 3D printing system mounted on a tower crane. According to the manufacturer, this is the world’s first device of its kind, capable of printing structures up to 100 meters tall. Achieving that required questioning what the construction industry had long taken for granted.

An industry stuck at ground level

To appreciate the Ascend, it helps to look at where concrete 3D printing stood until now. Companies like COBOD, ICON, and PERI have spent years building systems based on gantry frames, movable structures that travel along fixed rails. They work well, but they share one serious limitation: they cannot go beyond a few stories. The Danish COBOD BOD2, one of the best machines in this category, offers a build area 50 meters long, 15 meters wide, and just over 8 meters tall. At print speeds of up to 1000 mm/s, it is an impressive machine. Yet its three-story ceiling is a significant constraint, particularly for architects thinking about urban infrastructure, where building upward rather than outward is increasingly the only option.

The problem is clear. The greatest demand for housing is in cities, where land is expensive and the only sensible direction is up. A printer that cannot keep pace with a rising structure will not solve the problem of dense urban development.

The crane that builds by itself

Luyten approached the challenge differently. Rather than designing another gantry system, the company first analysed the market. The question they asked was simple: what machines are already present on every high-rise construction site? The answer was equally simple: tower cranes. The Ascend A27 transforms a standard tower crane into a robotic concrete printing system. The print head, suspended from the crane’s arm, deposits concrete layer by layer directly from a digital model.

The working radius extends 45 meters from the crane’s axis, allowing a single installation point to cover a large construction site. The working height reaches 100 meters, roughly 30 stories. According to the manufacturer, the system can be installed and commissioned within one to two days.

Movement of the print head and print path planning are handled by proprietary AI software that monitors progress in real time and optimises the sequence of material deposition. The concrete used in the system is Ultimatecrete, Luyten’s own mix developed for multi-story printing, with controlled flow properties and layer-to-layer bonding suited to tall structures.

What this means in practice

Luyten lists several concrete benefits. Reduced reliance on formwork, which in traditional construction generates enormous amounts of waste and labor time. Less dependence on manual labor in an industry that has struggled with shortages for years. Greater precision in material deposition, which the company says translates directly into less concrete waste.

That said, several questions remain open. A print head suspended from a crane arm is a system vulnerable to swaying. At high lateral movement speeds, positional accuracy may be difficult to maintain. Luyten has not released detailed data on dimensional tolerances or actual print speeds. Structural certification for multi-story buildings is a separate and lengthy process, one that has historically slowed every player in the concrete printing segment.

The direction, however, is clear

Regardless of how quickly the Ascend reaches real construction sites, the announcement itself sets a direction. Concrete 3D printing has been promising a construction revolution for years, but for most of that time the conversation was about single-family homes and small pavilions. The Ascend A27 shifts that conversation, for the first time, toward cities, apartment blocks, and infrastructure.

The tower crane has been a symbol of building upward for over a century. If Luyten is right, it may soon be what actually does the building.