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The decisive factor for treehouses anchored with Treehouse Screws is the compressive strength along the wood grain.

Hardwood (> 2.5 KN/cm²) – very suitable for Tree Screws:

  • Deciduous tree: maple, beech, oak, ash, walnut, sycamore, Robinia

 

Medium hardwood (2 – 2.5 KN/cm²) – well suited for Tree Screws:

  • Deciduous tree: birch, chestnut, alder, cherry, lime
  • Conifer: Douglas fir, pine, larch, spruce, fir

 

Softwood (< 2 KN/cm²) – moderately suitable for high load on Tree Screws:

  • Deciduous tree: aspen, poplar, pear, horse chestnut, elm, willow
  • Conifer: cedar

 

IMPORTANT:

These are only rough guide values – wood strength varies from tree to tree, from place to place and even in the same tree! More about this here… For the final suitability for treehouse construction, apart from the compressive strength, the sealing capacity, the wound healing also play an important role.

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