> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/e3d-user-manual/interface/toc175916526/steel-design2/steel-design-criteria/model-design-criteria.md).

# Steel Design Criteria

How to set steel design criteria including moment magnification, Cm, deflection limits, and section pools.

Steel Design > Steel Design Criteria > Steel Design Criteria prompts you with the following dialog.

![](https://560001759-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWNe8U6EBBBdUJHdb2X9G%2Fuploads%2Fgit-blob-8f0c4a887eb7346a09ac6087b8721426f51eac7b%2FSteel%20Design%20Criteria.jpg?alt=media)

Use Direct Design Method currently only affects how the moment magnification factor B1 is calculated. You also have the option not to consider moment magnification factor B1 altogether. Please be advised that P-Delta analyses should be performed on load combinations that are used for steel design.

To be conservative, you can always use 1.0 for Cm that accounts for nonuniform moment. Uncheck the Always use 1.0 for Cm” if you would like the program to calculate Cm for automatically.

You have the option to only use sections defined in Design > Steel Section Pool during the design process. This is useful if you do not want the program to use too many steel section sizes for the entire model.

Connector distance for double angles is used for sections that are double angles.

The default number of section candidates designed for each member is 10.

You can also specify limits for total load deflection and live load deflection.


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