What is the RISA Building System (RBS)? The answer is integration of RISA-3D with RISAFloor.

Who should consider the RBS? Engineers who design buildings.

If you design buildings, have the RISA-3D model automatically created and managed for you by combining RISA-3D and RISAFloor. Seamless integration lets you design both the gravity and lateral system from one model, eliminating dual efforts and error prone bookkeeping. The RISA Building System allows you to optimize your most precious asset, your time!

With the RISA Building System you will be designing your lateral system with the full power of RISA-3D, not a limited, black-box frame program. Plus, you can use the same 3D software for all of your other analysis needs (industrial, towers, tanks, etc.) without having to learn a new interface.

Lateral force resisting systems, including loads, are automatically created and managed. Gravity system members are kept separate from your lateral analysis but their loads are automatically included, even as they change. Seismic and wind loads are also created automatically based on the codes you specify. The following steps are automatically handled for you:

• The lateral force resisting system, shear walls or frames, is automatically created. As floors are defined in RISAFloor the RISA3D model is being created as well. After solving the RISAFloor model you may then evaluate the lateral force resisting system in RISA3D. Changes to either system are carried through automatically.
• Gravity member loads are placed on the lateral system. Gravity members are not part of the lateral system but they are part of the loads. RISA3D keeps these loads accurate as your project progresses.
• The wind loads are created automatically. ASCE-7 wind loads are based on the floor plans and elevations. These loads are automatically updated as your building model changes.
• The seismic loads are created automatically. UBC or IBC seismic loads are calculated along with required eccentricities to model accidental torsion.
• Add other loads, and modify the structure as desired! Since all of the RISA3D features are available to use on your building model you can add loads, define bracing as tension-only, model foundations along with compression-only soil springs, add moving loads, model partial height walls, model column girts, etc. See below for more information on RISA3D features.

RISA3D updates member sizes in the model based on the results of the lateral analysis. RISA-3D and RISAFloor seamlessly exchange information, resulting in a level of integration no other building design software can match.