I am developing new design for pre-cast floor deck slab on the basis of existing industrial pre-cast floor deck slab designs. But I am confused in how to initialize this work. I mean is it necessary to model this slab for FEA using ANSYS or any FEA tool? Because I am not familiar with these tools. Is it possible to make such designs in SAP or STAAD or STRAP or ETABS? Or any other way to skip such FEA.?