![]() ![]() Mechanical splicing assures the maintaining of the continuity of the Load path in the reinforcement, independent of the condition of concrete. Lap splices depend uponĬoncrete for strength so they lack structural integrity and continuity in construction. They've found that mechanical connections afford a reliability and consistency that can't be found with lap splicing. More and more engineers are specifying mechanical reinforcement connections over lap splices. Most popular splicing systems are Interlock, Quick wedge, Speed sleeve, Terminator, Lock, Form saver, Taper thread splices, and Cad weld splices. The applications include standard bar-to-bar connections, precaging applications, hooked bar applications, closure pours, precast connections, rebar terminations and anchorages, transition splices, segmental construction and connections to structural steel. The coupler system is available in several styles to meet virtually any application. Designed for use with worldwide grades of rebar, they develop theįull tension splice strength requirement per numerous design standards. Taper threaded splices utilize the time-tested, field proven taper thread for assurance of strength, consistency and reliability while simplifying installation. The coupler system is designed to connect two pieces of rebar together in the field quickly and easily. Couplers especially threaded one can simplify the design and construction of reinforced concrete and reduce the amount of reinforcement required. Of the three, lap splicing is the most common and usually the least expensive. Increases the overall reliability of reinforcement splices. The use of laps can be time consuming in terms of design and installation and can lead to greater congestion within the concrete because of Lapped joints are not always an appropriate means of connecting reinforcing bars. There are three basic ways to splice the bars: Lap splices, Mechanical connections and Welded splices. Keywords: Reinforcement couplers, Lap Splices, Column, Threading, Joints The reinforcement couplers not only provide strength to the joints but they are also an economic means of connections of two bars. ![]() ![]() This case study included calculations for 14 columns and showed that how couplers have effectively saved a huge amount of money in a single building. It also increases the overall reliability of reinforcement splices. It was found that the use of reinforcement couplers significantly reduces the consumption of both construction time and reinforcing steel. A comparison was done to show the difference of cost in lapping and use of couplers. Alternatively, the cost of steel was also determined for providing lap splices in the columns. An estimation of the cost of couplers was done. A case study of an under construction site was taken where couplers were used. Present study was focused on the use and applicability of reinforcement couplers, especially threaded ones as an alternative to lap splices. Splicing the reinforcement bars by laps or welding have various imperfections such as low quality welds, inadequate length of laps, failure in joints, increase in labour cost etc. Lap splicing has become the traditional method of connecting the steel reinforcing bars. GET, Ahluwalia Contracts India Ltd, Delhi, INDIAĬonstruction practices in the building of concrete structures have focused on the use of steel reinforcement to transfer tension and shear forces. Reinforcement Couplers As An Alternative To Lap Splices: A Case Studyĭepartment of Civil Engineering, Graphic Era University, Dehradun, Uttarakhand, INDIA ![]()
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