A method and apparatus for preventing twisting of at least one purlin. A roof construction has purlins extending between support beams to provide extra stability for the roof. To prevent purlins from twisting, a torsional brace is provided. A beam of the torsional brace extends between two of the purlins. A static clip is connected to a purlin, and a pin is used to secure one end of the beam to the clip. The other end of the beam can be similarly clipped to another purlin, or alternatively, the other beam can be bolted to the purlin.