Strip Foundation


The program FDS+ can be used to calculate the required dimensions of strip foundations under centric and uniaxial eccentric loading. For the selected dimensions, the required bending and shear reinforcement is determined. In addition to this, the software checks whether shear and bending reinforcement can be dispensed with in the lower layer. Moreover, verifications of the permissible base pressure, the gaping joint, the safety against sliding, displacement and ground failure are performed. Settlements can be calculated in addition and put out.

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Discover now more programs from the section Foundation Engineering!

  • Reinforced concrete with selectable concrete qualities and steel grades
  • Different materials for the foundation and the wall (masonry optionally available for the wall)
Structural system
  • Square and rectangular foundations
  • Optionally with eccentric wall
  • Wall optionally made of masonry or reinforced concrete
  • Offset wall can be shorter than the foundation



  • Any number of horizontal layers
  • Freely selectable soil parameters
  • Permissible base pressure resistance based on empirical values of DIN 1054

Ground surface:

  • Horizontal or continuously ascending
  • Any number of polygonal ground-surface sections


  • Stagnant groundwater can optionally be taken into account at any height level.


  • Any wall loads, if applicable, for biaxial loading:
    • Vertical line load Nz
    • Horizontal line load in the x-direction (optionally applying to the top edge of the wall or the foundation)
    • Horizontal concentrated loads in the y-direction
    • Linear moment about the y-axis
    • Concentrated moment about the x-axis
  • Any additional loads applying on top of the foundation as line loads.
  • Free assignment of loads to types of actions according to EC 0 as well as to concurrency and alternative groups.
Reinforced concrete design (internal stability)
  • Bending design
  • Shear force design
  • Check whether an unreinforced execution is possible
  • Design of the connecting reinforcement, if applicable
  • Specification of mats and/or barsteel for the reinforcement
Geotechnical verifications (external stability)
  • Simplified verification with base pressure resistances (either user-defined or taken from tables of DIN 1054)
  • Optional verifications using the accurate calculation method:
    • Overturning
    • Sliding
    • Ground failure
  • Optional settlement verification
  • Serviceability via the verification of the gaping joint and torsion
Document file formats
  • PDF
  • Word
  • Printer
  • Various output profiles available for selection (brief, detailed, user-defined)
  • Selectable graphic scales and font sizes
  • Detailed output of individual load cases with associated base pressure shapes
  • Overview of the decisive load case combinations and their assignment to the design situation (persistent, transient, accidental and earthquake)
Reinforced concrete design
  • Bending and shear force design with detailed graphical and tabular output
  • Output of the connecting reinforcement, if applicable
  • Output of the unreinforced concrete, if possible and applicable
Geotechnical verifications
  • Tabular and graphical output of the selected decisive actions and base pressures for each selected geotechnical verification
  • Verifications in the ULS (simplified with base pressure, overturning, sliding, ground failure)
  • Verifications in the SLS (first and second core range, settlements, and torsion)
Transfer options
  • Slabs by Finite Elements PLT
  • Block Foundation FDB+
  • Mast Foundation FDM+
  • Isolated Foundation FD+
  • Reinforced Raft Foundation FDR+
  • Ground Failure Analysis GBR+
  • Beam on Elastic Foundation BEB+
  • Soil Settlement SBR+
Load import
  • GEO Building Model
Geotechnical standards
  • EN 1997
  • DIN EN 1997
  • ÖNORM EN 1997
  • PN EN 1997
  • NF EN 1997
  • DIN 1054
  • DIN 4017
  • DIN 4019
  • ÖNORM B 4435-2
Reinforced concrete
  • EN 1992
  • DIN EN 1992
  • ÖNORM EN 1992
  • PN EN 1992
  • NF EN 1992
  • BS EN 1992
  • DIN 1045
  • ÖNORM B 4700
Add-on FDPro

With the additional option FDPro, the foundation programs FD+, FDB+, FDS+ and GBR+ can be extended to include:

  • an earth pressure approach
  • an inclined foundation base
  • a seismic ground failure verification
  • a ground failure – punching shear verification
  • a bearing capacity calculation of the foundation soil with a table of design values of the base pressure resistance.
  • a graphical output of the internal forces along the main axes

Note on the free 30-day demo
The additional option FDPro can also be tested for 30 days without a license. As soon as you call up a function from FDPro, you will be asked whether the function should start as a demo.

Find out more about the range of functions of the FDPro in the video.

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