Assembly system for wooden modular housing


This idea was developed in Garage48: Future of Wood event held in Tallinn in October 2019 Our solution proposes a system where different modules are joined together and start working structurally together. This enables to reduce the dimensions individual columns and beams. We developed 3 different types of joints. „Locked finers“ „ Butterfly“ and „Cross“ First „Locked fingers“ connects floor and ceiling beams of two modules stacked on each other. Second „Butterfly“ unite four corners of different modules into a one column. So each separate column can be smaller in dimension. The third joint „Cross“ act in two ways. It locks columns of different levels. In addtition it guides every next model to the correct spot while assembling.

Key benefit

Human-free assembly, less material, less time

Material list

Wood, plywood, LVL

Ecological values

This solution enables faster assembly, uses less material and is safer because workers do not have to be around.



  • Economical span (mm)
  • Thickness (mm)
  • Airbourne sound reduction factor (dB)
  • Impact sound transmission (dB)
  • Resistance to fire class
  • Thermal properties



Filename Size

MPD_4754 JPG2558 KB

MPD_4755 JPG1362 KB

MPD_4758 JPG1191 KB

MPD_4762 JPG2164 KB

MPD_4765 JPG1992 KB
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  • It's always good to see how a connection can be thought and designed (more or less) free of steel. I would search a way to lock it to withstand lift-up loads. Have you an idea of how many modules could be superposed with such connections, Good luck!
  • These are very well thought through connection ideas between elements (or panels) and volumetric modules. One question would be how the modules are connected where 4 modules join together.
  • Idea looks very innovative. Using spacers allows to fast on-site operation as part will interlock into each other. I would propose to think how to manage the potential on-site tolerances as I cannot currently understand how this would be managed.


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