Tks for Your help but I still don’t understand.
I interpreted that col-sm-8 means take 8 columns, col-sm-2 means take 2 columns and so on and the column has a predefined size (say 100/12%).
If this is not the case and I can redefine them am I forced to use such names or can I use different names ?
And col-sm-4 should be double of col-sm-2 or I’m free ?
I need, just as example, to have something like 2% / 18% / 30% / 2% / 18% / 30% .
Is it possible ?
I’m not interested to the responsiveness.