How to set such a grid in SUSY?

Question

css

The problem is this: there is a layout and a fairly standard grid. Decided to start using susy. Prior to that, only played by him, without real projects. 12 columns, 1200 artboard width, 80px column, 20px padding.
So, I tried everything, it would seem, options. I settled on the most suitable, but also not the right one. In this case, indents along the edges and with an offset. The other options are not correct at all.

columns: 12,
  column-width: 80px,
  container: 1200px,
  container-position: center,
  gutters: 1/4,
  gutter-position: split,
  global-box-sizing: border-box,
  math: fluid,
  output: float

Answer 1

gutter-position: split is the same as the bootstrap grid. You need to add another wrapper like ".row" and set a negative margin around the edges. www.sassmeister.com/gist/0ec0cb3e82eb21baa15fc250d...
And another question, reading your comments, in what context are you using span(5 at 2)?