It's a 50-50 propositiondepending upon the type of deflection you are anticipating. If you areexpecting dual-motion you would use sway braces in pairs.

48 Sway Braces for a Refinery Expansion Project
It's a 50-50 propositiondepending upon the type of deflection you are anticipating. If you areexpecting dual-motion you would use sway braces in pairs.