Manual cross-section classification for steel and aluminum design according to Eurocode

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In the default setting, the cross -section class for each member and load case is determined automatically in the design modules. In the input window of the cross -sections, however, the user can also specify the cross -section class manually, for example if local buckling is excluded by the design.

Selection of the cross -section class in the add -on module

By classifying the cross -sections according to EC3 and EC9, the local stability risk due to normal stresses is considered in the design. The cross -section classes and their meaning are also described in detail in other technical articles (see links below this article).

For example, if the cross -section is set in concrete, the plates cannot buckle locally and it is not necessary to consider the risk of buckling in the design. In order to also apply this fact in the add -on module, the cross -section class can be specified manually. This input can be done in the input window of the cross -sections.

The selected cross -section class is now used by the add -on module in all designs of this cross -section. There is no further check and local buckling is not considered.

This option is available in the add-on modules RF-/STEEL EC3, RF-/ALUMINUM, and RF-/TOWER Design.

Forcing an elastic design format via classification in cross -section class 3

The manual classification of cross -sections of class 1 or 2 in cross -section class 3 can also be used to force an elastic design from the add -on module. However, if you want to apply this to all cross -sections, you can select the elastic design format in the detailed settings of the module.

Author

Dipl.-Ing. Oliver Müller

Dipl.-Ing. Oliver Müller

Product Engineering & Customer Support

Mr. Müller is responsible for the development of the add-on modules for steel structures and provides technical support for our customers.

Keywords

Cross-section class Buckling Cross-section check Classification

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  • Updated 04/07/2021

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RFEM Steel and Aluminum Structures
RF-STEEL EC3 5.xx

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RFEM Towers and Masts
RF-TOWER Design 5.xx

Add-on Module

Design of triangular and quadrilateral lattice towers according to European standards

Price of First License
1,480.00 USD
RFEM Steel and Aluminum Structures
RF-ALUMINUM 5.xx

Add-on Module

Design of aluminum members according to Eurocode 9

Price of First License
1,480.00 USD
RSTAB Steel and Aluminum Structures
STEEL EC3 8.xx

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RSTAB Towers and Masts
TOWER Design 8.xx

Add-on Module

Design of triangular and quadrilateral lattice towers according to European standards

Price of First License
1,480.00 USD
RSTAB Steel and Aluminum Structures
ALUMINUM 8.xx

Add-on Module

Design of aluminum members according to Eurocode 9

Price of First License
1,480.00 USD