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AI Engineering
Hacker News·Jun 28·5 min read
Daisugi the Japanese Technique of Trees Out of Trees, Making Exact Straight Wood
TL;DR
In 15th century Japan, a shortage of seedlings and land for tree cultivation threatened traditional architecture. The solution was daisugi, a technique that grows additional trees from existing ones, producing straight and strong lumber.
✦ Why It Matters
Engineers can explore sustainable forestry techniques like daisugi to enhance material properties and reduce environmental impact.
Key Takeaways
- Investigate sustainable tree cultivation methods for construction.
- Consider the mechanical properties of materials in design.
- Explore historical techniques for modern applications.
- Promote practices that prevent deforestation and enhance material quality.
Full Summary
By the 15th century, Japan faced a significant shortage of seedlings and suitable land for growing trees, which was essential for its traditional architecture. To address this, artisans developed daisugi, meaning 'platform cedar,' which involves cultivating new trees from the branches of existing ones, resembling a giant bonsai.
This technique produces perfectly vertical trees that yield straight, round timber known as taruki, used in the roofs of tea houses. Daisugi timber is not only aesthetically pleasing but also boasts impressive properties: it is 140% more flexible and 200% denser than standard cedar.
This makes it particularly suitable for rafters and roof timber, providing resilience against typhoons. Remarkably, this 600-year-old technique continues to be admired and utilized today, showcasing its lasting impact on sustainable forestry practices.