Design Ratios on Members

The result tables in the Design Ratios on Members category contain the results data for the performed design checks, including the respective design ratios.

Result Table "Design Ratio on Members" for "Timber Design"

The member results are sorted in the tabs according to the following criteria:

• Loads (design situations, load combinations)
• Member properties (materials, cross-sections)
• Objects (member sets, members, member locations x)

Member Set No. / Member No.

For each design criterion, the number of the member set (if designed) and the member exhibiting the highest design ratio is specified.

Location x

The x-location of the location on the member for which the maximum design ratio was determined is specified. The following x-locations are relevant for the output in tables:

• Start and end nodes
• Member result intermediate points (if defined)
• Member division according to Mesh Settings for members
• Extreme values of internal forces

Stress Point No.

The design is performed at the stress points of the cross-section. These points are defined by the coordinates of the centroidal distances. All standard cross-sections in the library are marked with stress points at the locations relevant to the design.

You can check the stress points in the cross-section information dialog box. To do this, click the button in the table toolbar. In the “Stress Points” tab of the information dialog box, the stress points are listed with their coordinates and displayed on the cross-section (see the section Stress Points in the RFEM manual).

Design Situation

This column lists the numbers of the design situations for which the individual design ratios are available.

Load

The numbers of the load or result combinations that are governing for the respective design checks are specified.

Design Criterion

This column lists the design conditions according to standard. The degree of the respective design ratio is indicated by the length of the colored bar.

Type of Design

Each design is identified by a numeric code. For example, cross-section checks according to Eurocode are identified by the code “SP”, stability analyses by the code “ST”, and serviceability checks by the code “SE”. The type of design is explained in the Description column.

Design Check Formula

You can activate this column in the Result Table Manager. It lists the equations from the standard used to perform the design checks.

Description

Each design check is explained with a brief description that refers to the relevant chapter in the standard.

Filtering Results by Limit State

If you want to only display results for specific limit states or types of design in the table, set the corresponding filters in the Result Table Manager. For example, you can only display the results for stability analyses by deactivating all “rows” except for Stability.

The buttons in the table toolbar also allow you to quickly show or hide results for specific limit states. They provide access when design checks for the corresponding limit states have been performed.

	Show or hide results for the ultimate limit state
	Show or hide results for the serviceability limit state
	Show or hide results for fire resistance design checks

Displaying Governing Design Only

Filtering Results by Design Ratios

The list on the right side of the table toolbar allows you to filter the tables by design ratios. The Max option only displays the governing design check for each object.

Result Table "Design Ratio on Members" for "Timber Design", Result Filter for Maximum Design by Object

You can also use a user-defined filter criterion. To do so, use the Define option in the list. This opens the Result Table Manager dialog box with the Criteria – Values tab. Specify the condition—for example, to only display design ratios that are greater than a certain value.

Defining Filter Criteria for Design Ratio

The chapter Filtering Result Tables of the RFEM 6 manual describes how to define conditions for the table values.

Optimizing Cross-Section

If the design checks for a cross-section are not fulfilled, you can let the program optimize the cross-section. The program searches for the smallest possible cross-section within the same cross-section series that meets the requirements. Proceed as follows:

1. Set the table category to Input Data for steel design.
2. Switch to the Cross-Sections table.
3. Click in the corresponding cell of the Use Other Section for Design column in the table.
4. Open the list and select the Optimize option (see the image Optimizing Cross-Section).