A post mounting system comprises a post and at least one device for mounting to the post. The post is of a type that comprises a first elongate flange and at least one other elongate projecting flange that projects from a proximal edge of the first flange. A portion of the first flange is deformed to facilitate mounting of the device thereto. The device is adapted for location at a given position along the first flange. Immediately upon being located in the given position, the device interacts with the deformed portion to resist lateral movement away from the first flange. The device can comprise a body and projections that extend from the body to define a recess therebetween. Remote ends of the projections can be spaced from each other by a distance that is less than a lateral width of the deformed portion of the flange prior to mounting the device to the post. The device can be configured such that it is able to be positioned onto the post and receive the deformed portion of the flange in the recess to enable mounting of the device to the post.
