Laterally Unbraced Length

Input the Laterally Unbraced Length that is used to calculate lateral torsional buckling resistance in the compression flange of I Girder or top flange of Tub Girder.

Note

If the laterally unbraced length is not entered, the span length obtained from Span Information will be applied for the laterally unbraced length. If the Span Information data are not defined either, the corresponding element length will be used as the laterally unbraced length. The value input here has higher priority than the value obtained from Span Information or the element length.  

From the Main Menu select Rating > Bridge Rating Design > CS454/20 > Steel Bridge > Laterally Unbraced Length.

Select the members in the model, and then enter the following:

Option

Select Add/Replace or Delete.

Add/Replace: Add the newly entered values or update the previously entered values.

Delete: Delete the entered values. Data entry is not required when deleting.
 

 : Apply the entered values to the selected members.

 : Close the entry Dialog Bar.