• Reinforced Concrete Structures

Design of Single, Bucket and Block Foundations


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The RF-/FOUNDATION Pro add‑on module designs single, bucket and block foundations for all support forces arising in the RFEM/RSTAB model. The design of reinforced concrete foundations is performed according to:

  •  EN 1992‑1‑1:2004 + A1:2014
The geotechnical designs are performed according to the standard:
  •  EN 1997‑1

In addition to the support forces from RFEM/RSTAB, the module allows you to specify loads to be integrated into the design of a foundation. RF‑/FOUNDATION Pro provides a reinforcement concept for the upper and lower plate reinforcement, which is individually adjustable at any time.

  1. Features

    • Available types of foundation:
      • Foundation plate (optionally without bending reinforcement)
      • Bucket foundation with smooth bucket sides
      • Bucket foundation with rough bucket sides
      • Block foundation with smooth bucket sides
      • Block foundation with rough bucket sides
    • Design according to EN 1992-1-1 and EN 1997-1
    • The following National Annexes of Eurocode 2 and Eurocode 7 are available:
      • Germany Germany:
        DIN EN 1992-1-1/NA/A1:2015-12 | DIN EN 1997-1/NA:2010-12
      • Austria Austria:
        ÖNORM B 1992-1-1:2018-01 | ÖNORM B 1997-1:2007-11
      • Denmark:
        DK EN 1992-1-1/NA:2013 | DK EN 1997-1/NA:2007
      • Bulgaria:
        BDS EN 1992-1-1:2005/NA:2011 | BDS EN 1997-1:2005/NA:2012
      •  Finland:
        SFS EN 1992-1-1/NA:2007-10 | SFS EN 1997-1/NA:2004-01
      • France France:
        NF EN 1992-1-1/NA:2016-03 | NF EN 1997-1/NA:2006-09
      •  Italy:
        UNI EN 1992-1-1/NA:2007-07 | UNI EN 1997-1/NA:2005-01
      • Netherlands Netherlands:
        NEN EN 1992-1-1 C2:2011/NB:2016-11 | NEN EN 1997-1+C1:2012/NB:2012
      •  Poland:
        PN EN 1992-1-1/NA:2010 | PN EN 1997-1/NA:2005-05
      •  Slovakia:
        STN EN 1992-1-1/NA:2008-06 | STN EN 1997-1/NA:2005-10
      •  Slovenia:
        SIST EN 1992-1-1:2005/A101:2006 | SIST EN 1997-1/NA:2006-03
      •  Spain:
        UNE EN 1992-1-1/NA:2013 | UNE EN 1997-1:2010
      • Sweden Sweden:
        SvenskS EN 1992-1-1/NA:2008 | SvenskS EN 1997-1:2005/AC:2009
      • Czech Republic Czech Republic:
        CSN EN 1992-1-1/NA:2016-05 | CSN EN 1997-1/NA:2014-06
      • United Kingdom United Kingdom/Northern Ireland:
        BS EN 1992-1-1:2004/NA:2005 | BS EN 1997-1:2004
      • Weißrussland Belarus:
        CPM EN 1992-1-1:2009 | CPM EN 1997-1:2009
      •  Cyprus:
        CYS EN 1992-1-1:2004/NA:2009 | CYS EN 1997-1/NA:2004

    In addition to the National Annexes (NA) listed above, you can also define a specific NA, applying user-defined limit values and parameters.

    • Automatic calculation of governing loading from load cases
    • Specification of additional support forces
    • Determination of the reinforcement proposal for the bottom and top plate reinforcement considering the most favorable combination of mat and rebars
    • Individual adjustment of reinforcement proposal
    • Results of foundation reinforcement in detailed reinforcement drawings
    • Results displayed in tables and graphics
    • Visualization of foundation, columns, and reinforcement in 3D rendering
  2. Input

    Foundations are assigned graphically by selecting supports using the [Select] function in the graphical user interface of RFEM/RSTAB and by specifying the load cases to be designed. You can define all other foundation details quickly and easily in clearly arranged input windows.

    In addition to all support forces from RFEM/RSTAB, you can specify further loads to be considered when dimensioning the foundations. The following additional loadings are available:

    • Pemanent surface load due to earth covering
    • Negative surface load; for example, due to traffic
    • Ground water level for uplift consideration
    • Concentrated loads in any position on the foundation plate
    • Line loads with any distribution over the foundation plate
  3. Design

    It is possible to perform the following designs:

    • Equilibrium limit state design
    • Uplift limit state design
    • Ground failure (soil contact pressure) design
    • Strong eccentric loads design
    • Design of foundation torsion and limitation of gaping joint
    • Sliding design
    • Settlement calculation
    • Bending failure design of the plate and bucket
    • Punching shear design

    Foundation and bucket dimensions can be user-defined or determined by the module. You can edit the determined reinforcement manually. In this case, the designs are updated automatically.

  4. Results

    The program creates a reinforcement proposal for the top and the bottom plate reinforcement. The program searches automatically for the most favorable reinforcement combination, with a mat and added rebars. If required, the rebars are distributed across two reinforcement areas by curtailment. It is possible to modify the reinforcement proposal individually by:
    • Application of another mat type
    • Individual control of diameter and spacing of added rebars
    • Free selection of reinforcement area widths
    • Individual curtailment of reinforcements

    You can display the foundation in excellent rendering quality, including reinforcement. In the rendering, as well as in up to seven different dimensioned reinforcement drawings ready for construction, the module provides a solution proposal for bucket design. It is possible to modify the number, position, diameter, and spacing of used rebars here as well. You can also determine the shape of the applied links.

    The dimensions of the foundation plate and bucket can be determined by the add-on module, or can be user-defined. Clearly arranged windows display the results of each performed design, including all intermediate values. They are covered in a reduced printout report providing a verifiable structural analysis.


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