In this research paper. a 3-D finite element model was used for the analysis of curved concrete slab on steel girder bridges. A parametric study was carried out to calculate the load distribution factors for horizontally curved steel I-girder bridges based on (AASHTO LRFD) live loads . The bridges are analyzed by three dimensional finite elements using SAP 2000 software (Structural An... https://toyscyclers.shop/product-category/arts/