Each sleeve features a threaded end that is used for the connection to reinforcement at the precast element and a wide cavity to perform a grout connection at site. The range comprises two standard coupler types: Full-grout sleeves and Half-grout sleeves.Ĭombo Grout-Filled/Threaded Sleeve– This type of sleeve is designed for the connection of precast elements. This is filled with a cement-based, non-shrink, high-early strength grout. Grout-Filled Coupling Sleeve- This type of sleeve is filled with grout that provides a mechanical bond between rebar deformations and grooves on the inside of the sleeve. It is designed to fit between closely-spaced bars. Straight Threaded Coupler with Upset Rebar Ends- This type of coupler consists of forming heads on the ends of the bars that are connected using a hydraulic machine. The couplers are normally supplied fitted to the end of the threaded bar, requiring only the engagement and tightening of the adjoining bar on site. The compact design of each coupler ensures suitability for use in confined situations where space is restricted or where the loss of cover must be minimised. Taper-Threaded Coupler- This type of coupler is designed for applications that require the joining of reinforcing bars. Splicing of the bars is completed by installing one pre-threaded component into the other. This consists of pre-threaded components, which are swaged onto the reinforcing bars using a swaging press with special dyes. These are deformed onto the reinforcing bar profile to produce mechanical interlock. This type of splice comes in three pieces, the two bar ends and the internally threaded coupler.Ĭold-Swaged Threaded Coupler- This type of coupler is made of seamless steel sleeves that are placed at the end of reinforcing bars. It is used to reduce the net cross-sectional area of the reinforcing bar. Non- upset thread Coupler- This type of coupler consists of internal straight threads at each end that join two reinforcing bars with matching external threads. The coupler consists of a coupler with internal straight threads at each end that joins two upset end reinforcing bars with matching external threads. It can connect rebars of the same or different diameters laterally, vertically and slantingly. Upset Straight Thread Coupler- This type of coupler is used to produce a full-length mechanical joint between reinforcing bars with upsetting ends. These are assembled with lock nuts and threaded couplers, then the nuts are tightened to the specified torque. Each of them is explained below.Ĭoupler for Thread-Deformed Bar- This type of deformed bars comes with special bars with thread-like rolled deformations. Mechanical splices used in forms to mechanical connection between two pieces of reinforcing steel in concrete constructionīased on the category of ‘tension- compression’, ‘compression only’ and ‘tension only’ there are different types of mechanical splices available.
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