Deformed reinforcing bar splice and method

A method of forming a deformed reinforcing bar splice comprising the steps of cutting a bar to length, cold working the bar end by radially cold forming the bar end at a section of the bar end, then forming a thread on the compressed bar end, with the threads being axially within the cold formed and threaded bar ends to form a deformed reinforcing bar splice, wherein said threads are tapered and said sleeve has matching internal threads, and wherein said formed section extends beyond the tapered threads along the length of the bar.

A method of forming a deformed reinforcing bar splice comprising the steps of cutting a bar to length, cold working the bar end by radially cold forming the bar end at a section of the bar end, then forming a thread on the compressed bar end, with the threads being axially within the cold formed section, then threading an internally threaded sleeve onto two such formed and threaded bar ends to form a deformed reinforcing bar splice, wherein said threads are tapered and said sleeve has matching internal threads, said cold forming step forming a taper section on said formed section to facilitate threading, and said cold forming step forms a cylindrical section next to and at the larger end of said taper section;

• and then forming threads on said taper section.

A process for forming a deformed bar end used in concrete construction comprising the steps of cutting the bar end, then radially cold forming the bar end by pressing the bar end to remove the deformations at the bar end and to cold work the bar end while circularizing the bar end, and threading the radially pressed section of the bar end to receive a threaded sleeve coupler, the length of radial cold forming being substantially longer than the threads so that the mouth of the coupler will be positioned on a pressed area of the bar extending beyond the mouth of the coupler.

A method of forming a deformed reinforcing bar connection comprising the steps of cutting a bar to length, cold working the bar end by radially compressing and cold forming the bar end, then forming a thread on the compressed bar end, with the threads being axially shorter than the length of the cold formed section, then seating the threaded bar end into the mouth of an internally threaded sleeve to form a deformed reinforcing bar connection.