S-STEEL structural engineering automated design and analysis software for steel frame construction s-steel structural design





Analyze, Design and Detail foundations in one complete solution package.

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model courtesy of CBCL Ltd

Define and Detail irregular shaped foundations without holes

Design and Optimize Pile Foundations using linear soil springs or non-linear pile soil springs from Lateral (P-Y), Friction (T-Z) and Bearing (Q-Z) soil curves. Soil curves are automatically calculated from user-defined soil profiles, or optionally manually entered.



Interactive pick and drop tools allow you to quickly define the foundation configuration while S-FOUNDATION automatically generates and manages the underlying FEA model using proven S-FRAME Software meshing and solver technology.
Design Wizards optimize foundations in a quick and efficient manner.


Runs as a stand-alone analysis and design foundation application or integrated within S-FRAME Analysis, with two-way data links that automatically apply foundation loading conditions and post processing, integrates the optimized foundation model with the S-FRAME Superstructure model for a more detailed soil-structure interaction analysis.

Optionally import support data ( locations, reactions, preliminary foundation design) from any 3rd party analysis package, to generate a design and optimize the foundations.


Wizards expand the S-FOUNDATION core functionality, automate work flow and enable process sharing throughout an organization. Built-in Wizards design foundations, create foundations, import loads from third parties, attach footings to column bottoms and more. User actions are automatically recorded and can be exported into scripts for playback or saved customized further and turned into easy-to-use Wizards.

Comprehensive Results

View code check results to any desired level of of detail – including intermediate calculations, formulas and code clauses.
Filter results on multiple criteria to pinpoint area of interest.
Advanced 3D model visualization, comprehensive and customizable reports in PDF or Excel format.


S-FOUNDATION 2018 Features at a Glance

+ view     Foundation Types

Mat or Raft Foundations
   - Mat or Raft foundations can contain areas of different thicknesses and recesses with each area sharing
      or having independent rebar definitions
   - Can contain any number of pedestals and walls
   - Can contain any number of holes
   - Parametric pad shapes include rectangle, circle, ring (tank), regular polygon (pentagon, hexagon, octagon, etc.)
   - Irregular pad shapes can be a user defined polygons and polygon strips

Wall Footings
   - Walls may have varying thickness and offsets
   - Wall footing strips with varying widths in any configuration, including non collinear and intersecting wall strips
   - Wall centerline offsets allow walls to follow borders of holes and steps
   - Wall footing pedestal pads allow for pads that are offset from the pedestal
   - Support for multiple pedestals on isolated pads connected to wall strips

Pile Foundations
   - All foundations may be pile supported
   - Support for automated and/or customized pile arrangements
   - Piles can be modeled to have different dimensions, rebar and soil conditions within the same foundation
   - Option to generate soil springs for the pad in addition to the piles
   - Nonlinear Pile Soil Springs from PY (Lateral), TZ (Friction) and QZ (Bearing) curves.

Isolated/Spread Footings

Continuous Footings

Combined Footings

Strap Footings

+ view    Soil and Soil Profiles
  Includes soil types with default properties based on the Unified Soil Classification System (USCS)  
  Support for Single Layer and Multi-Layer soil profiles, with option for different backfill soil  
  Ultimate soil bearing capacity can be auto calculated for each soil layer using Hansen, Meyerhoff, Terzaghi, and Vesic geotechnical closed form solutions
  Support for Exposed or Submerged basement foundations with no backfill soil and displaced water buoyancy effects  
  Automatically created pile soil springs based on pile diameters, depth and soil layer properties  
+ view    Reinforcements
  Multiple top and bottom rebar layers can be defined with
  • uniform rebar
  • rebar strips
  • rebar patches
Rebar Strips and Patches enable the user to add additional rebar to any localized areas requiring extra steel.
  Analysis result contours, such as force contours, moment contours, stress contours, and rebar utilization contours, make it easy to define strips and patches where they are needed.  
+ view    Design Codes
  ACI 318-11
  CSA A23.3-04  
  Eurocode 2 EN 1992-1-1:2004 Default and UK Annex  
+ view    Structural Design

Design using the Rigid method or Flexible (FEA) method

Design checks utilization the trusted built in S-FRAME FEASolver and S-CONCRETE design engine

  PEDESTAL Structural Checks Include  
     - Ability to perform checks at various sections along pedestal length
   - Axial force vs Moment Interaction*
   - Shear and Torsion*
   *with consideration for Biaxial Bending, Biaxial Shear, Axial Force and Torsion
  PAD - Structural Checks Include  
     - One way shear
   - Punching shear**
   - Flexure
   **Punching Column Classification correctly accounts for edges of irregular shaped foundations
  Piles - Structural Checks Include  
     - Axial Force
   - Shear Force
   - Pile-to-Pile Cap Interface results
   - Structural checks performed along entire pile length
        Axial force vs Moment interaction, Shear and Torsion
+ view    Geotechnical (Soil) Checks
  Support for soil types based on the Unified Soil Classification System (USCS)
  FOUNDATIONS Geotechnical Checks
  Soil Bearing
  Soil Settlement
  Loss of Contact (Uplift)
  Horizontal Sliding
  Analyze using the Rigid method or Flexible (FEA) method
  PILES Geotechnical Checks
  For Piles modeled as reaction springs applied at the pile to pile-cap interface, S-FOUNDATION checks the axial force at the pile head, and the axial & lateral deflections.
  For the more advanced Pile modeling method, where piles are modeled as long members with intermediate linear or non-linear soil springs, S-FOUNDATION code checks the axial force at pile heads, and the axial and lateral deflections along each pile's entire depth.
+ view    Additional Calculated Results and Quantities
  Overburden pressure   Rebar Cut Lengths  
  Effective Rebar Depths   Rebar Total Lengths  
  Punching Perimeter   Rebar Weights  
  Steel Area   Rebar Costs  
  Total Loads including pedestal, pad and soil weights   Concrete Volumes  
  Maximum Axial, Tensile and Compressive Resistances   Concrete Weights  
    - Corner Pressures
    - Area in Compression
    - Area Experiencing Loss of Contact (Uplift)
    - Soil Resistances along Pile depth
    - Soil Curves (PY, TZ, QZ)
  Concrete Costs  
+ view    Load Case and Load Combinations
  Generate load cases automatically from imported S-FRAME FEA results
  Import third party load cases
  Manually define load cases, or run an automation script
  Support for additional substructure loads for foundation weight, soil weight, buoyancy and surcharge area loads
+ view    Surcharge Area Loads
  Surcharge Area is automatically generated to fit the foundations with defined holes for the pedestals
  Option to create any user-defined surcharge area shape and holes
  Surcharge Area definitions may overlap and contain holes
+ view    Analysis
  Analysis features built on proven and trusted S-FRAME Analysis engine
  Finite Element Model (FEM) is automatically generated and managed by S-FOUNDATION
  FEM model includes members for pedestals and straps, shells for pads, rigid bodies for connections, extra loads for soil weight and buoyancy, and soil springs
  Automatically generated strip integration lines, with exclusion areas, based on code requirements and pedestal locations
  Nonlinear and linear analysis capabilities
  Option to export the foundation model to S-FRAME Analysis to automatically combine the super and substructure models for further analysis
+ view    Automation and Customization Features

  Design Wizards
    Optimize Foundations quickly and efficiently using built in Design Wizards  
  Automation Wizards
   •  create foundations
 •  import loads from 3rd party applications
 •  attach footings to superstructure columns
 •  and more
  User Defined Wizards
  User actions are automatically recorded and can be exported into scripts for playback, or further customized and turned into Wizards to expand core functionality  
  Create and automate your own custom work-flow/processes, saving them as Wizards  
  Open API and completely integrated Python scripting environment with extensive function libraries.  
+ view    Graphical Display Results

Foundation deflections
Pile deflections


  Contour Diagrams

Soil Pressure Distribution
Forces (Axial, Shear, Moment, Torsion)
Wood Armer Moments
Steel Area Requirements
Rebar Zone Utilizations


  Strip Line Diagrams
Forces (Axial , Shear, Moment, Torsion)
Wood Armer Moments
Steel Area Requirements
+ view    Importing and Exporting Data

3rd Party data transfer links for
  • Revit™ 2015, Revit™ 2016, Revit™ 2017
  • ETABS™ 9.7.4 and ETABS™ 2015
  • STADD™ Pro
Revit™ 2015, Revit™ 2016, Revit™ 2017 data sharing links
Revit™ 2015, Revit™ 2016, Revit™ 2017 data sharing links
  Import S-FRAME Analysis superstructure model (geometry, section properties, loading and analysis results).
Export foundation model, superstructure model or both to S-FRAME Analysis
  Import data from from 3rd party analysis software (Support Locations, Support Reactions, Preliminary Foundation model) in Excel, or CSV file format.
  Comprehensive Report Generation in PDF or Excel format includes
• project information
• foundation definitions
• analysis and design results
• details and material quantities