US Patent 9353538 Stiffening strut for garage door panels

A stiffening strut to be used in conjunction with a rear surface of a garage door panel having a given width-wise length, formed in a generally U-shaped body. First and second sidewalls each with a bottom side edge and a top side edge, a front edge and a rear edge, the bottom side edge extends to first lengthwise mounting sleeve having an interior edge aligned with said bottom side edge, the first mounting sleeve having an outer edge parallel to the inner edge, the first lengthwise mounting sleeve having a given width, the first lengthwise mounting sleeve having a multiplicity of spaced apart openings by which fastening means affix the stiffening strut to the top of a garage door panel.