Portal Frame


The S7+ program is used to calculate plane, single-bay portal frames. The available roof types are double-pitch, single-pitch, and flat roofs. Roof projections and asymmetrical frames can also be defined. Compared to the data entry for the structural system and the loads in a framework program, the definition of the geometry and the loading in the S7+ program is easier and needs considerably less time.

to the shop

Discover now more programs from the section Steel!


Different materials can be selected for the individual components. The following materials are available:

  • Structural steel: S235, S275, S355, S450
  • Annealed steel (S275N – S460N)
  • Thermo-steel (S275M – S460M)
  • Weathering steel (S235W – S355W)
  • High-temperature steel (S460Q – S460QL1)
  • Hollow section, hot-finished (S235H – S355H)
  • Hollow section, hot-finished, fine-grain (S275NH – S460NH)
  • User-defined steel
Structural system

Available systems:

  • Two-hinged frames with or without cantilever(s)
  • Three-hinged frames with or without cantilever(s)
  • Restrained frame with or without cantilever(s)


  • I-sections as standard shapes
  • User-defined I-sections


  • Base pinned or restrained
  • Consideration of spring values for restrained and horizontally sway bases
  • The user can define the frame corners with a joint, as being flexurally rigid or by means of a torsional spring
  • Intermediate restraints for cross beams and columns out of plane (rigid/spring value) can be defined in addition
  • Translational and torsional restraints for the cross beam
  • Haunches can be defined on the cross beams, columns, and cantilevers in the area of the frame corners
  • The loads generated by snow, wind and the self-weights of the roof and wall structures are determined automatically with consideration of the defined building geometry. When the user changes the structural system subsequently, these loads are adjusted automatically
  • The wind and snow loads are determined in accordance with the specified location of the building
  • Automatic inclusion of the self-weight of the steel sections
  • The user can enter user-defined load cases in addition
  • Automatic generation of the load case combinations
  • Concentrated load (transverse/longitudinal), moment and line load
  • Definition of corbel loads

The program maps automatically all necessary combinations of actions in accordance with the safety concept set forth in Eurocode 0.

Structural safety

Either the elastic or plastic cross-sectional resistance is verified. The load combinations decisive for the design are calculated in a second-order analysis with consideration of the initial sway imperfection. Furthermore, the verification of the system’s load-bearing capacity is performed using the equivalent member method either in accordance with section 6.3.3 Annex A or B or with section 6.3.4.


In connection with the verification of the serviceability, the program determines the deformations of the structural system as well as the relative deformations of the individual components. The user must specify the design situation that should be used for the serviceability verification.

Document file formats
  • PDF
  • Word
  • Printer

Output profile:

  • Pre-set brief output or user-defined scope

Result graphs:

  • Internal forces: N, M, Q
  • Deformations: vx ; vz
  • Stresses: σ,x ; τ,z ; σ,v
  • Utilization Eta: n,el ; n,pl ; n,stability
Transfer options
  • End Plate Joint SPS+
  • Steel Frame Corner SRE+
  • Steel Column Base ST3
  • Pocketed Steel Column Base ST6
  • Isolated Foundation FD+
  • Block Foundation FDB+
  • Lateral Torsional Buckling Analysis BTII+
  • Framework RSX
Import options
  • ASCII-file
Export options
  • Word
  • PDF
  • strut-and-tie model XML
Structural safety verifications
  • DIN EN 1993-1-1
  • ÖNORM EN 1993-1-1
Determination of wind and snow loads
  • DIN EN 1991-1-3:2019
  • DIN EN 1991-1-4:2010
  • ÖNORM EN 1991-1-3:2018
  • ÖNORM EN 1991-1-4:2019

Support resources