FLAC/Slope

FLAC/Slope uses the graphical interface and the automatic factor-of-safety calculation of FLAC as the core of a user-friendly code that models slope stability problems under a wide variety of slope conditions. These include: arbitrary slope geometries, multiple layers, pore pressure conditions, heterogeneous soil properties, surface loading, and structural reinforcement.

FLAC/Slope 8.10.467 (and greater) is now freeware and is available at no cost. Hard-lock, network, or web licenses are not required to operate this full feature, non-restricted version of the software. However, free technical support is no longer provided to the freeware version. We encourage you to report any suspected bugs and paid technical support is always available.

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Highlighted Features

  • Specialize version of FLAC with a streamlined user interface for evaluating the factor of safety (FoS) of slopes;
  • Uses Shear-Strength Reduction (SSR) method to calculate FoS;
  • Simple, fast model set-up and analyses execution;
  • Wizards for slope, bench, dam, and general topography;
  • Include 3D structural ground support (rock bolts, soil nails, and geogrids);
  • Include an interface between materials to model geological or artificial surfaces;
  • Axisymmetric or plane strain analyses;
  • Specify the location of a water table for effective stress analysis;
  • Apply forces;
  • Specify the materials either manually or from a database;
  • Specify geological layers; and
  • Plot calculated FoS, velocity vectors, shear strain, and plasticity indicators.
FLAC/Slope Updates


Latest News
  • Itasca has announced the release of FLAC2D v9 Itasca has announced the release of FLAC2D v9, revolutionizing the way we analyze and predict...
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  • 6th Itasca Symposium on Applied Numerical Modeling The next Itasca Symposium will take place June 3 - 6, 2024, in Toronto, Canada....
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  • Itasca International Inc. announces the Selection of its New CEO Itasca International Inc. announces the Selection of its New CEO ...
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Upcoming Events
15 Jul
EUROCK 2024
The conference will feature two main tracks: the scientific track and the industrial track. There will be short courses and workshops o... Read More
26 Aug
FLAC3D V9.1 and Griddle V2.0 2024
... Read More