Vault Ply



The vault ply is an element made with plywood. It consists of a piece of 60 cm by 120 cm of 12.5 cm of thickness and the view faces have the fibers parallel to the axis of the vault, in this way it is easier the arching of the piece. In order to achieve bigger surfaces to the compression will be necessary to apply two layer of pieces. I suggest that the layer below the boveda and its upper side contain two layers of Vault Ply glued to each other in the parallel orientation to the axis with finger joint system. A second layer also serves to complete the assembly of the pieces. All are superimposed and crossed. That way there is a single layer glued and screwed. Between both layers there will be a batten cross frame (as it appears in the scheme) The whole of the lower layer and the upper and the core with the batten, results in a unique body and working to the compression and thus work like a real vault. Its core allows the circulation of air and it is recommended in times of heat to take advantage of its internal ventilation and to remove the heat by the upper ridge. Reinforced brick vaults were very common in the last century, using steel and portland cement, all materials with CO2 footprint. And in this century it is very common the realization of arched beams on which are supported elements that do not necessarily work to the compression. With my proposal I intend to simplify a bit the resolution of vaults without the need for special beams. I `m developing another ""egg shell"", which has inspired many builders. Obviously this wooden vault should be covered with all necessary precautions against the environment.

Key benefit

Build vaults in a simple way without arch beams

Material list


Ecological values

A wooden vault has a lot more less CO2 footprint than a concrete one, and also much less energy for building it.



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



    • This system looks promising. By using long LVL panels to span the full length of the vault, the finger joint in the panels could be avoided. Depending on the span the thickness of the outer layers could also be reduced to a minimum. However, the support forces in the vault can be quite high in need to be pulled back into the structure with a tensile rod.


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