What are the best stone types for outdoor sofa bases in earthquake zones?
When selecting stone materials for outdoor sofa bases in earthquake-prone areas, durability and stability are critical. The best stone types include:
1. Granite – Highly dense and resistant to cracking, granite offers excellent seismic stability.
2. Basalt – Known for its strength and low porosity, basalt withstands ground movement well.
3. Sandstone – While softer, properly sealed sandstone provides good shock absorption.
4. Slate – Its layered structure allows slight flexibility, reducing fracture risk during tremors.
5. Limestone – A heavier option that adds weight to anchor furniture securely.
For optimal safety, choose thick, well-anchored stone bases and avoid brittle materials like marble. Proper installation with reinforced footings further enhances earthquake resistance.
