Patent ID: 8661763

Claim:
A purlin brace system for roof decks, comprising: a. a plurality of purlins, each purlin including a central support and a bottom flange, said plurality of purlins oriented to form a parallel array of purlins such that voids exist between the purlins in the parallel array, the bottom flanges defining a lower plane; b. at least one brace oriented transverse to the plurality of purlins, said at least one brace having a span member transverse to a purlin axis, and at least two vertical plates secured to at least two of the plurality of purlins along the central supports, respectively, and cantilevered from and attached directly to the span member such that the at least two vertical plates extend substantially perpendicularly away from the span member and along the central supports to resist rotational movement of the corresponding purlins and minimize interruption of the voids.