RAM Frame accomodates several features providing great flexibility for analysis of buildings with diaphragms. For analysis with lateral loads, the engineer is offered a selection of different diaphragm types, including rigid, semirigid and pseudo-flexible. Regarding analysis with gravity loads, one-way or two-way load distribution can be carried out in the program.
The program meshes a diaphragm if it is semirigid or it has a two-way deck. The meshing process is automated so that all meshing compatibility issues between diaphragm and intersecting walls and columns are taken care of. In addition, loads (surface, line or point loads) on two-way decks are handled in such a way that they are converted into equivalent nodal loads applied at mesh points. Overlapping surface loads are also resolved by the program. Finally, mass loads are distributed in a similar way so that spatial mass distribution is considered in analysis.
Regarding analysis with diaphragms, here is brief summary of the current capabilities in RAM Frame v14.03:
A more detailed information is provided in the following document: RAM Frame - Analysis with Diaphragms.pdf