What are the thermal stress failure points in granite outdoor trash cans?

Granite outdoor trash cans, while prized for their durability and aesthetic appeal, are susceptible to thermal stress failures. Thermal stress occurs due to uneven expansion and contraction of the granite material when exposed to fluctuating outdoor temperatures, particularly in regions with extreme daily or seasonal variations. Key failure points include micro-fractures that develop along natural mineral grain boundaries, which can widen over time into visible cracks. These cracks often originate at structural weak points such as corners, edges, or areas around drainage holes, where stress concentrates. Prolonged exposure to direct sunlight can cause surface spalling, where layers of granite flake off due to differential heating. Additionally, repeated thermal cycling weakens the stone's internal structure, leading to potential splitting or complete breakage. To mitigate these issues, proper installation with expansion joints, selection of granite with low thermal expansion coefficients, and routine inspections are recommended for maintaining longevity.