ANNA's Engineering
Structural engineering
At the heart of ANNA’s design lies a custom-designed rail system that ensures smooth movement while offering robust protection against the elements. A wind labyrinth, integrated brushes and rubber seals form a weather-tight seal between the structure’s moving layers, keeping nature at bay when needed, and inviting it in when desired.
To further enhance its resilience, ANNA is equipped with insulated double glazing and specially engineered trusses capable of withstanding wind speeds of up to 160 mph. These trusses are built from a core of 30mm A-quality plywood, reinforced with aluminum inserts, and finished in solid wood.
The angled 45-degree roof isn’t just a nod to traditional form; it’s a functional choice that enables snow to slide off easily, while the structure itself bears the weight of heavy snowfall with ease. Beneath it all, the platform is reinforced with high-density cross beams, keeping ANNA stable in even the harshest conditions.
Move ANNA's shells with ease
Each of ANNA’s shells weighs over 3,000 kilos, yet can be moved by hand as easily as rolling your carry-on bag when traveling. This surprising smoothness is made possible by a system of precisely balanced steel rails and high-quality, low-friction German bearings. There are no motors or electronics involved, just the efficiency of good design. It’s a quiet, physical experience that connects you to the structure—and to the outdoors—every time you move it.
Contributing to the endurance of ANNA is the fact that, due to her modular nature, elements can be replaced over time. Much like in a car, ANNA's wheels can be replaced over time without compromising the shells. Every ANNA comes with a 7-year warranty and a lifetime of ANNA Care.
Why moving the shells by hand matters for how you think and feel, neuropsychologist Margriet Sitskoorn explains here.
The brakes
ANNA is equipped with a brake system of our own design, inspired by the simple efficiency of a bicycle hand brake. It allows users to effortlessly slow and gently stop the movement of the heavy shells, ensuring ease and control. This mechanism enhances both safety and the tactile experience of opening and closing ANNA.
The platform
A perfectly level platform is essential for smooth sliding. Traditional foundation systems often have tolerances that are too imprecise for our needs. That’s why we developed a custom frame that allows for micro-leveling and is compatible with various foundation types, including screw foundation (helical piles) and concrete piers.
Recessed bed & bathtub
A queen-size bed can be cleverly stored beneath the floor, raised and lowered with ease using a finely engineered spindle-and-winch system. It rises into view when needed and disappears when not, transforming the space with a simple turn. A sunken bath allows you to step down into comfort at eye level with the natural environment the cabin was designed to frame.
Onsite assembly
ANNA is delivered in modular components and shipped directly to the site. Installation takes just 3–4 weeks and requires no specialized tools, making assembly straightforward, yet precise.
Unlike many mobile structures, ANNA isn’t limited by road transport dimensions. Freed from those constraints, its design remains spacious and intentional. While engineered for permanence, ANNA can be disassembled if needed, offering both longevity and flexibility.
Every ANNA is placed with care. Its connection to the landscape is deliberate and site-specific, ensuring that each structure feels rooted in its surroundings.
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