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Should be for both. Please see: http://docs.csiamerica.com/help-files/etabs/Menus/Define/Section_Properties/Frame_Sections/Auto_Select_Option.htm Thanks.

If you could upload a few sketches or cross-sections of the bunker and the office, in order to clarify levels & location of the two structures with respect to each other, it might facilitate the forum to provide you with a better advice.

ETABS checks both minimum and maximum reinforcement checks for beams and columns.

AFAIK, ETABS (& probably SAP2000 as well) indicates required reinforcement ratio, in cases where it is less than maximum steel ratio. Otherwise, member is marked as 'O/S #2 ', indicating that the required reinforcing is more than maximum steel ratio. However, required reinforcement ratio is not output by the software in the later case. This is in line with general practice (especially in case of columns) that actual amount of reinforcing steel is kept below 50 percent of the maximum permissible steel ratio, in order to facilitate splicing of reinforcement at different floor levels (where actual steel ratio will be doubled due to lapping of bars). On the other hand, in case of beams, required area of steel given by ETABS might be more than maximum steel ratio. Whether the required reinforcing is less or more than the maximum permissible steel ratio, has to be checked & verified by the designer himself, manually or through a purpose-made spreadsheet. Regards.

In general, ACI 318 is a Material Design Code, governing the structural design of Reinforced & Prestressed Concrete elements & structures only. On the other hand, UBC 97 is a complete Building Code. It provides specifications for most parts of a building structure, whether structural or non-structural. It includes design requirements, not only for concrete elements (as does ACI 318), but also for several other types of structural materials e.g., Structural steel, masonry and wood etc. Moreover, it provides specifications and requirements for non-structural building components as well. A common use of UBC 97, in our country, is as a 'Loading Code' for calculation of mainly earthquake loading for framed structures (either concrete or steel). HTH Regards.