I have a Validation > Analysis > FE chase-down > “Pattern load status not defined” warning. Why do I get this and how do I resolve it?

Question

Following an analysis or design I have a Validation > Analysis > FE chase-down > “Pattern load status not defined” warning. Why do I get this and how do I resolve it?
 

Image

Answer

If we hover over one of the problem items a tooltip is displayed “No panels have been set as unloaded in this pattern case”.

Image

This means that you have opted to consider pattern loading by checking the option “Patten load” in the Load ribbon > Loadcases dialog but you have not looked at the loaded/unloaded arrangement of slab panels to define the patterns you wish to consider for this load case. All slabs are currently fully loaded so the warning is displayed.

Image

To resolve;

1. If you do not intend to consider pattern loading uncheck the option Pattern load in the load case dialog.
2. If you do intend to consider pattern loading you will need to use the Load ribbon tab > Update Patterns command. Select a pattern load case in the Properties window and then using the selection techniques - single click, window or Shift+line define the unloaded and loaded panels for design. The choice of which is an engineering decision.

    

   Image

   
   
   Once the loaded/unloaded arrangement of the slabs had been defined for this pattern load case, repeat as required for the other pattern load cases. For further details on working with Pattern loading refer to this page.

If you run the analysis or design again you will see that the Validation warning has been removed from the list.

Image