Grout-filled mechanical splices typically use a cylindrical-shaped coupler or sleeve that is open-ended and varies in length, wall thickness, and diameter. The interior of the grouted portion of the sleeve is deformed to aid bonding between the grout and the sleeve and to increase slip-resistance.

Mechanical couplers offer benefits over traditional lap splices or welded splices, including reduced labor by eliminating tying or welding rebars, reduced steel consumption, and less rebar congestion by eliminating laps. While numerous styles of mechanical couplers are on the market, a one-size-fits-all solution does not exist. Each type offers advantages in different applications.

Fully grouted couplers do not require steel overlap or special rebar end preparation like threading or saw-cutting. These grouted sleeve characteristics save contractors time and labor, contribute to jobsite safety, and eliminate the need for special rebar equipment.