RISAFoundation gives you the ability to solve and optimize all types of foundation systems, including mat foundations, grade beams and isolated spread footings.


The program fully and completely integrates with RISA-3D and RISAFloor, providing a complete structural design solution.

Modeling Features

• Foundation systems can be any combination of mat slabs, grade beams, spread footings and combined footings
• Slabs can be any arbitrary shape with varying thickness and can include openings and discontinuities
• Design of isolated spread footings
• Model and design grade beams: between slabs, on slab perimeters, between spread footings and independent
• Variable soil properties possible throughout the foundation system
• Impose point supports anywhere in the model. Supports can be rigid, tension only, compression only or tension-compression spring; well suited for modeling pile supports.
• Comprehensive CAD-like graphic drawing/editing capabilities that let you draw and modify as well as snap, move, rotate, copy, scale, delete, apply, mirror, etc.
• Versatile drawing grids (orthogonal, radial, skewed)
• Universal snaps allow drawing without grids
• Powerful graphic select/unselect tools including box, line, polygon, invert, criteria, spreadsheet based, with locking
• True spreadsheet editing with cut, paste, fill, math, sort, find, etc.
• Unlimited undo/redo capability and automatic timed backup
• Dynamic synchronization between spreadsheets and graphics
• Open multiple spreadsheets simultaneously
• Constant in stream error checking and data validation
• Support for all units systems & conversions at any time

Analysis Features

• State-of-the-art plate/shell element with automatic calculation of transverse shear
• Automatic meshing of slabs into well formed quadrilateral elements (NO triangular elements are created by the mesher). This is all done behind the scenes without any user interaction necessary, though user may optionally control the size of the mesh
• Physical member used for grade beams, automatic inclusion of internally generated mesh points
• Soil spring stiffness automatically calculated based on soil subgrade modulus and slab tributary area
• Self weight of slabs and beams is automatically calculated and may be optionally excluded in the analysis
• Unlimited load cases and load combinations
• Point loads, point moments, line loads and area/patch loads can be applied anywhere on the slab

Design Features

• Calculation of rebar requirements using design strips
• Design strips may easily be drawn anywhere on the slab
• Design cuts can also be drawn anywhere on the slab
• Design for bending and shear at all design cuts
• Calculation of punching shear
• Grade beams are automatically designed and detailed
• Automatic enveloping and rebar calculation
• Design codes: ACI 1999/2002/2005
• Automatic code based (ASCE, UBC, IBC, BOCA, SBC, ACI, International) load combination generation as well as user specified combinations
• Exact integration of concrete stress using either parabolic or rectangular stress blocks

Result Features

• Color contouring of the slabs based on:
o Transverse shears
o Bending moments
o Displacements
o Soil pressure
• Tabular and graphical display of design results
• Slab deflected shape plotting and animation
• Line cut tool shows the distribution of moments and shears in the slab at any location, in any direction, simply by drawing a line
• Separate detail reports for spread footing designs
• Comprehensive grade beam detail reports with force and detail design calculations and expanded diagrams
• Rebar detailing for slab and beam design
• Graphical display of total moments/shears for a design strip
• Spreadsheet results with sorting and filtering of all output: slab forces, beam forces, displacements, soil pressure, etc.
• Standard and user defined reports
• Rebar schedule and DXF export