In the extreme vertices of a cross section, the bending stress is maximal, while the torsional shear and transverse shear
are 0 or negligible small.
In the mid points of outer flanges and webs, the bending stresses are 0 or small, while the torsion shear and
the transverse shear stresses are maximal.
Hence the vertex and mid points are examined separately.

Calculation of stress in four extreme vertex points:
bending stresses σ_{z1,2,3,4} and normal stress σ_{zn} [N/mm²], comparison stress σ_{comp}
and the safety factor on failure S_{F}.

Calculation of stress in the outer mid points:
bending stesses σ_{z1,2,3,4} and normal stress σ_{zn} [N/mm²], torsional stress
τ_{t} [N/mm²], shear stresses τ_{sy} and τ_{sx}, comparison stress σ_{comp}
and safety factor on failure S_{F}.

Draw up of comparison stress diagram for both cases.

Calculation of Deflections

The lateral deflections are calculated and presented in a table. Vertical deflection y and horizontal deflection x and twist angle φ.
Example of vertical and horizontal deflection diagram:

Calculation of natural frequency

The natural or 'eigen' frequency is determined for the first bending mode.
The own weight of the beam and the distributed load (converted to a mass load) is taken into account for the mass-spring model.
The distributed load is considered as a mass rigidly connected to the beam.

Dimensioning Problem

Input of permissible stress σ_{P} [N/mm²] and the permissible deflection f_{P} [mm].
Selection of a cross section with the Cross Section Switch dialog. See verification problem.

For a welded plate beam, the minimum required cross section is determined for the I - or box section to respect
the stress - and deflection limits. In the dialog box the required input is displayed: b/h width/depth ratio,
the flange thickness t and the web thickness s. The application iterates a calculation loop until
the cross section respects the stress and deflection limits. Calculation results are displayed in a table: z, h, b, and b/h.
The results table can be printed.