Park chairs are designed to withstand harsh outdoor conditions while maintaining structural integrity. Manufacturers use high-quality materials like powder-coated steel, aluminum, or UV-resistant plastics to combat rust, corrosion, and UV damage. Reinforced joints and welded frames distribute weight evenly, preventing stress points. Additionally, sloped seating and drainage holes prevent water accumulation, reducing moisture-related weakening. Regular maintenance and protective coatings further enhance durability, ensuring these chairs remain sturdy for years. By combining robust materials and smart design, park chairs effectively resist structural weakening.