In structure, having columns coupled or put into sets, with an interval generally of just one diameter and a half involving the facilities associated with the paired articles, as well as more than three diameters amongst the exterior columns of this pairs, calculated from center to center. See cut under systyle.
In design, having articles coupled or put in pairs, with an interval generally speaking of just one diameter . 5 involving the centers associated with the coupled columns, and of a lot more than three diameters between the exterior articles for the sets, measured from center to center. See cut-under systyle.