Abstract: A device for supported by roof structure utilizing a platform having first and second surfaces the second surface bears on the roof. The platform includes a slot between the first and second surfaces which accepts a slidable element. An element is formed with a flange and extending legs which form a chamber within the slot of the platform. The flange portion of the element is provided with an opening to accept a fastener which extends through the chamber into the roof. A filler material occupies the chamber and protects the fastener within the chamber.