Set default edge horizontal alignment or change multiple elements

[bocallaghanCY8HD]

Hello,

My business uses a separate structural analysis software, which we export geometry into from Revit.
Our workflow involves changing all analytical floors from Auto-detect to Projection in order to conduct this export and get the correct geometry in our secondary software.

However, it seems to be impossible to set the default for new floors in Revit to have projection type for the analytical alignment, and even in an analytical model view, selecting multiple analytical floors doesn't allow for changing multiple floors at once. Therefore this is a slow and cumbersome process. 

Is there a means to set the default for analytical floors to be projection, or a means of changing multiple or all analytical floors in a project or view or selected at the same time?

Regards,
Ben

[jay_colcombe]

I am not sure of the Version of Revit you are using as they differ significantly in creating analytical models!!!

In the Revit Template you are using can you edit the analytical floor to have only one type set Projection?    

it sounds like you have tried already but to check;

The are a couple of Revit methods to edit the properties of multiple Elements.

In a 3D view select a floor the using the Temporary Hide or Isolate Tool on the View Control Tool Bar (Glasses Icon) > Isolate Category.

This will only keep all floors, and as they in the same category common parameters can changes at once selected with a selection window or more precisely - select one > right click > select all instances visible in view.

The other method is to create a simple schedule for the floors and include the parameter you need to change.

Making the floors group together you can change the parameters here using the drop down parameter in the cell.

This method is good for filtering out non-structural floors etc.

The other option would be to create a Dynamo script to search for floors with Auto-detect and switch to Projection.  A little more work initially but you simply you only have to do it once.