semantics aside (hehe), you described the grid class of bootstrap, not semantic ui. In semantic its something like "ten wide column" or "four wide column" etc.
I rarely use semantic for its grid though. Those are now easy problems to solve. I use it because it gets me a clean and pretty UI I can theme later to adjust the specifics (or get someone who is better at design than me to do it).
I rarely use semantic for its grid though. Those are now easy problems to solve. I use it because it gets me a clean and pretty UI I can theme later to adjust the specifics (or get someone who is better at design than me to do it).