Patent ID: 7845139

Claim:
A method of making a closure assembly that includes at least one end rail, at least one side rail and a butt corner joint between said end rail and said side rail, said method including the steps of: (a) assembling a threaded fastener to a rail insert such that the threaded fastener is non-rotatable within said insert and includes a head that is disposed in a pocket of said insert and is captured by a finger of said insert at least partially overlying said pocket, and a threaded shank of said fastener extends from said head and through a through opening of said insert and further extends from an end of said insert, (b) inserting said insert into an open end of a first of said rails such that said threaded shank extends from said open end, (c) placing a second of said rails against said open end of said first rail over said threaded shank such that said threaded shank extends into said second rail, and (d) clamping said second rail to said open end of said first rail by tightening a nut onto said threaded shank.