Merge 3 collumns in a data table

Hi,

I am trying to make my merge 3 columns in a data table into 1 column.
The maximum length of the data pasted in the new column has to be 48.

My datatable variable is called: Datatable1

Can someone help me in solving this?
I have read several topics about this without being able to solve it.

@Karsten_Bertelsen

please provide some datasamples and a detailled description of the expected output. So we can adress it individually to your scenario