What is rebar coupler?
What is rebar coupler?
Rebar couplers are used for joining rebars with full tension capacity. The ends of bars to be joined are provided with threads, and the bars are joined using a coupler sleeve that transfers the force on the rebar across the connection.
What is coupler in steel?
Mechanical Couplers are the cylindrical element that connects the two rotating edges of reinforcement bars, also known as an alternative to lapping rebars. The grade of the coupler should be equivalent to the reinforcement bars which ensures the maximum transmission of the load stresses from one bar to another.
What is a Type 2 splice?
A Type 2 mechanical splice, as defined in Section 21.1. 6.1(b) of the ACI 318 Code, is a mechanical splice that meets the requirements of a Type 1 mechanical splice and also develops the specified tensile strength of the reinforcing bar.
What is a mechanical coupler?
Couplings are mechanical components used to connect two in-line shafts to enable one shaft to drive another at the same speed. A coupling can be rigid or flexible, allowing various amount of angular, radial, and axial misalignment between the two shafts.
Where are mechanical couplers used?
Mechanical couplers are widely used in the present construction industry to joint two reinforcement bars together. The lapping of reinforcement is very difficult and time-consuming. Further, some costs also can be saved with mechanical couplers.
Why coupler is used in construction?
A steel coupler is used to couple or joins two pieces of steel together in the building. When long lengths of steel bars are needed in building a column or when the need of joining additional reinforcement to existing bars arises, the general practice is to ‘lap’ (tying of bars together next to each other).
Is code for rebar couplers?
1.1 This standard covers the requirements and tests applicable to reinforcement couplers to be used in reinforced concrete constructions for mechanical splicing of bars conforming to IS 1786.
Why do we use coupler?
The ends of steel bars to be joined are provided with threads, and a coupler is used to join rebars end-to-end, which transfers the loads on the rebar across the connection. They are more efficient than lap splices because they do not depend on the concrete for load transfer.
What is V groove splicing?
A fixed V-groove splicer uses an electric arc fired between two electrodes orthogonal to the longitudinal axis of two fibers to melt their ends and fuse them together. To achieve a low loss splice with good mechanical strength the splicer must use the correct temperature for fusion.
How does a bar lock coupler work?
Bar Lock couplers utilize lock-shear bolts and serrated grip rails to mechanically splice the rebar. The serrated grip rails are embedded in the rebar as the lock-shear bolts are tightened.
What is the d250l Bar Lock® L-series coupler?
The D250L Bar Lock® L-Series Coupler is similar to the Standard Coupler but is designed for use when higher loads are required, such as extreme tension/compression application and/or seismic loading conditions.
What rebar sizes do L-series couplers come in?
L-Series couplers are available in rebar sizes #4 through #18 and exceed minimum ultimate strength of Grade 60 rebar to achieve a Type 2 splice. L-Series couplers are approved for use by most state DOTs, are recognized as an IAPMO as a type 2 seismic splice, and meet ACT specifications.
