les étapes de montage d'un section de poteau de l'Arbre de la Terre
 

314 m² et 20 m de diamètre au sol 200m de haut !

A 60m diameter cupola at between 170 and 200m above ground
The Tree is slender.
At 82m the Tree's diameter is 12m.
At 110m the Tree's diameter is 9m.
At 155m the Tree's diameter is 8m.

Proportions, a poetry of space and an unequalized universe of balance !

The calculations, the wind tunnel tests, and the models make it possible to affirm this spacial audacity verified by the CSTB at Nantes. (Centre Scientifique et Technique du Batiment - The Jules Verne Wind tunnel in Nantes).
The walks around the pillars, in and around the "habitacle" express the force of the world in its fragility.

2500 T in tension.

  Schéma de construction d'un poteau de l'Arbre de la Terre
Carrelet de poteau bois de l'arbre de la terre en essai de traction au laboratoires du CSTB

 

The laboratory tests allow us to check the capacity of the wooden pillars to resist tensile efforts of a magnitude uncommon in timber structures.
 


Wind resistance up to 250 km/h
Maquette de soufflerie du pied de l'arbre de la terre  
Maquette de l'Arbre de la Terre dans la soufflerie Jules Vernes du CSTB à Nantes

The wind tunnel structural models tested by the "Centre Scientifique et Technique du Batiment"
at the Jules Verne wind tunnel in Nantes.