Surfaces

In the Surfaces tab of the 'Design Configuration' or 'Strength Configuration' dialog box, you define the basic settings for the design of surfaces.

Tab "Surfaces" for Steel Design According to EN 1993

Tab "Surfaces" for Steel Design According to AISC 360

The 'Design Parameters' are divided into categories, which differ depending on the design code.

Utilization Limits for Ignoring Internal Forces and Stresses

This category manages one or more limit values that concern very small stresses. If the stress is below the defined ratio η, it is not considered in the verification. The background for this option is described in more detail in the chapter Stäbe | Basis.

Construction Factors (for AISC)

Here, you can adjust the resistance factor Φ (for LRFD) and the safety factor Ω (for ASD), if applicable, to be applied to the design of the surfaces.

Structural Importance Factor (for GB)

Tab "Members | Surfaces" for Steel Design According to GB 50017

In this section, you can adjust the factor γ₀, if applicable, by which the design values of the internal forces are multiplied. This factor is regulated in GB 50017, 3.1.9, GB 50018, 4.1.3, and GB 51022, 3.1.3. Further information can be found in GB 50068 and GB 50009.

Partial Safety Factor of Materials from Another Code (for GB)

If required, you can adjust the partial safety factor for the material strength (see image Stahlbemessung nach GB 50017): Select the 'Custom' check box and enter the factor γ_R.