How to design stone benches with adjustable backrests for versatile public use?

Designing stone benches with adjustable backrests for public spaces requires a balance of durability, comfort, and flexibility. Start by selecting high-quality, weather-resistant stone materials like granite or limestone for longevity. The backrest mechanism should allow easy adjustment, such as modular slots or hinges, to cater to different seating preferences. Ensure ergonomic angles (100-110 degrees) for optimal comfort while maintaining structural stability. Incorporate anchoring systems for security in high-traffic areas. For versatility, consider modular designs that allow reconfiguration of bench layouts. Add subtle textures or patterns to the stone surface to enhance aesthetics and prevent slipping. These benches can serve parks, plazas, and urban walkways, offering adaptable seating solutions for diverse public needs.