The difference between Beam vs Grid model

Question

Dear supporter, can you tell me this difference as using RM wizard, precast girder bridge (in general tab). 
 Thank you,

Diether · Answer

Hi Hai, 
you are right, the selection buttons for choosing the computational model "beam/grid/FEM" are only applicable for the type "Reinforced Slab", for other types always "grid" will be taken. We will deactivate the selection for the types where it is not applicable to avoid confusion. 
Thanks for the hint!