The Traditional methods of lapped joints are not always an appropriate means of connecting reinforcing bars. Lapped joints are dependent upon the concrete for load transfer. The use of laps can be time-consuming in terms of design and installation and the increased amount of rebar creates congestion within the concrete.
Couplers are designed to mechanically join two bars together. By creating an end-to-end bar connection, a continuous load path is created from one bar to another that is independent of the condition and quality of the concrete. Mechanical splices are reliable under conditions of cyclic loading into the inelastic range and prove to be advantageous at the locations where inelastic yielding may occur.
BENEFITS OF COUPLERS
Spliced rebar performs like continuous reinforcement due to the mechanical joint, unlike lapping which has a complete dependency on concrete.
Steel wastage is reduced significantly. Using couplers saves lap length steel. A 12m rebar can be divided into 3m or 4m as bars as required which also prevents the wastage of end pieces of steel.
Staggering of bars not required.
Bar cross-sectional area is not reduced.
Couplers used as a replacement to dowel bars which also saves formwork material.
Steel congestion is reduced due to the elimination of laps.
Using couplers provides superior cyclic performance as compared to lap joint.
Rebar Coupler + Rod Threading – 25mm The Traditional methods of lapped joints are not always an appropriate means of connecting reinforcing bars. Lapped joints are dependent upon the concrete for load transfer. The use of laps can be time-consuming i...
