Optimization of steel beams with external pretension, considering the environmental and ｦnancial impact Kamila Madeira Fiorotti Federal University of Espírito Santo Gabrieli Fontes Silva Federal University of Espírito Santo Adenilcia Fernanda Grobério Calenzani Federal University of Espírito Santo Élcio Cassimiro Alves (  elcio.alves@ufes.br ) Federal University of Espírito Santo Research Article Keywords: Optimization, Genetic Algorithm, steel beams, external pretension, CO2 emission Posted Date: March 24th, 2023 DOI: https://doi.org/10.21203/rs.3.rs-2719483/v1 License:   This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Additional Declarations: No competing interests reported.