RAM Structural System Help

Assign Column Effective Length Factor

Selecting Assign > Column > Effective Length Factor opens the Assign Effective Length Factor dialog.

From this dialog the engineer can override, on a member by member basis, the global effective length factors specified in the Criteria-Effective Length Factor dialog. This criterion is not utilized unless the user has selected to consider column slenderness in the Criteria-Analysis dialog (the option to ignore is only available if ACI 318 is the selected design code).

Select the appropriate values from the dialog (Refer to Criteria - Effective Length Factor help for more information on the various options). The engineer can choose to override the global criteria in one or both axes of the member. The criteria are applied to the columns local axes.

After the appropriate values are specified the engineer can assign the criteria to a single member (click on Single), to multiple members (click on Fence) or to all members (click on All).

If Single is clicked the dialog will close and a target cursor will be made available. Click on each section that you would like the criteria to apply too.

If Fence is clicked the dialog will close and a fence cursor will be made available. Click and drag a rectangle around all the sections that you want the criteria assigned too.

Note that the criteria are only assigned to concrete columns. To return to the dialog to select a different effective length criteria click on the right mouse button.

To view which member axes are using the global criteria and which have been overridden select the appropriate option from the View-Members Dialog .