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4.1 Design by Load Case

The upper part of the window shows a summary of the governing designs (i.e. the maximum design ratios for each action), sorted by load case, load combination, and result combination. The table is divided into ultimate as well as serviceability limit state and fire resistance designs.

The lower part includes detailed information on the cross-section properties, analyzed internal forces, and design parameters for the load case selected above.

Figure 4.2 Window 2.1 Design by Load Case: Maximum Design Ratios for Ultimate Limit State, Serviceability Limit State, and Fire Resistance Designs
Description

This column shows the descriptions of the load cases, load and result combinations for which the designs have been performed.

Member No.

This column shows the number of the member with the maximum design ratio for the designed action.

Location x

This column shows the respective x-location of the member where the maximum design ratio occurs. The following member locations x are used for the table output:

  • Start and end node
  • Division points according to optionally set member division (RFEM Table 1.16 or RSTAB Table 1.6)
  • Member division according to specification for member results (Calculation Parameters dialog box of RFEM/RSTAB, Global Calculation Parameters tab)
  • Extreme values of internal forces
Design Ratio

Columns D and E show the design conditions according to [1], [2], and [4].

The length of the colored bar represents graphically the respective design ratio.

Design According to Formula

This column displays the code's equations from which the designs have been performed.

In the Details table, the design formulas are shown with the design conditions that are relevant for the selected design.

Figure 4.3 Design Formula shown in Details table

This function is also described in the Knowledge Base on our website.

DS

Column G provides information on the design relevant situations (DS): PT or AC for the ultimate limit state, or one of the three design situations for serviceability (SC, SF, SQ) according to the specifications in the 1.1 General Data window (see Figure 2.1).

Literature
[1] Eurocode 3: Design of steel structures - Part 1‑1: General rules and rules for buildings; EN 1993‑1‑1:2010‑12
[2] EN 1993-1-2 (2005): Eurocode 3: Design of steel structures - Part 1-2: General rules - Structural fire design [Authority: The European Union Per Regulation 305/2011, Directive 98/34/EC, Directive 2004/18/EC]
[4] EN 1993-1-4 (2006): Eurocode 3: Design of steel structures - Part 1-4: General rules - Supplementary rules for stainless steels [Authority: The European Union Per Regulation 305/2011, Directive 98/34/EC, Directive 2004/18/EC]