This paper discusses ergonomic human body support in regard to people reading and talking on public benches. An applied experiment has been developed where design parameters are structured and associated to anthropometric dimensions relating to observed ergonomic postures. These are incorporated to a procedural design strategy using a geometric model with combination rules. The procedure has been tested, allowing a generation of alternative designs to emerge from ergonomic fitness parameters. The experiment helped to formulate a design methodology for optimizing the information during the product design and manufacturing processes.