US Patent 11054223 Mounting and fastening system rail

A mounting and fastening system rail has an inboard-outboard axis, and comprises: a rail inboard surface extending transversely with respect to the axis; a rail outboard surface extending transversely with respect to the axis; at least one sidewall extending between the rail inboard and outboard surfaces and having at least one hanger mounting edge; and at least one endwall extending between the rail inboard and outboard surfaces and having an incurvate tapered surface extending between the rail inboard and outboard surfaces and tapering in an axially inboard and radially inward direction.