Patent ID: 8833031

Claim:
A device for fastening a support structure on a flat roof, which is provided with an insulating layer covered by a sealing strip, the device comprising: an upper connection element for the support structure, with a spacer device which is configured to be guided through an opening, cut in the sealing strip and the insulating layer, to support the upper connection element on a roof sub-structure, and with anchor fasteners for anchoring the spacer device on the roof sub-structure, the spacer device comprises a spacer part that comprises a longitudinal axis and is produced as an over-length tubular hollow profile extrusion which is comprised of a thermally isolating material and is cut to length according to a thickness of the insulating layer and the sealing strip by cutting a length from the over-length hollow profile extrusion to form a hollow profile extrusion part that is adapted to be placed through the openings directly over an entire base area thereof on the roof sub-structure, the opening in the insulating layer having a diameter or clear width which is equivalent to a diameter or thickness of the tubular hollow profile extrusion part, the opening being sized to receive the tubular hollow profile extrusion part, the spacer device further comprises axially penetrating hollow chambers or grooves extending in a longitudinal direction of the tubular hollow profile extrusion part and being provided at a radially exterior edge of the tubular hollow profile extrusion part, each of which serves as a guide element for respective ones of the anchor fasteners to facilitate placement of the anchor fasteners.