Weld Design


The ST5 program is used for the design of fillet welds for any type of rolled standard section. Therefore, it is suitable for the verification of a classical corbel connection.

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Discover now more programs from the section Steel!

  • 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


  • I-sections, half I-sections, U-sections, T-sections, square, rectangular and circular hollow sections, angular, round, square and flat steel sections as standard shapes
  • Double T-sections, unequal double T-sections, rectangular and circular hollow sections, rectangular solid sections, U-sections, round steel sections, angular steel sections with equal and unequal legs as user-defined shapes


Weld seams:

  • Depending on the selected section the most appropriate welding pattern is proposed
  • The length and thickness of the weld seams is editable
  • The suggested weld seam thickness is the smallest possible value that can be realised in construction


  • Design internal forces from axial force, moment (My, Mz) and shear force (Vy, Vz)
  • Multiple combinations of design internal forces can be entered

Either the elastic or plastic cross-sectional resistance of the steel section is verified in accordance with EN 1993-1-1. For the verification of the weld seam, the user can select whether the simplified or directional method as per EN 1993-1-8 should be used.

Document file formats
  • PDF
  • Word
  • Printer
  • User-defined output scope
Export options
  • DXF-file
Steel construction
  • EN 1993
  • DIN EN 1993
  • ÖNORM EN 1993
  • DIN 18800

Support resources