Repair splices eliminate the cost of breaking away massive amounts of concrete.Mechanical splices and Headed Bars eliminate congestion and simplify bar placing.Dowel bar substitutes reduce labor on site, form work costs and increase job site safety.Mechanical splices are cost effective by reducing labor costs and accelerating job schedules.Mechanical splices are fast and easy to install and require no specially skilled labor.Here are some other advantages for mechanical couplers towards project time savings. Prefabrication, reusability and many other factors give mechanical couplers clear advantages over lap splicing. Small amounts of efficiency over the length of a project can really add up to an improvement in on overall project timelines. Read more about prefabrication and nVent LENTON solutions. Using mechanical couplers to connect PRC units greatly reduces labor, material and crane costs. These innovations have the potential to dramatically accelerate construction schedules and reduce fabrication costs while also allowing for more reliable quality control. Prefabricated rebar cages (PRCs) are built in fabrication yards on-site or in a remote location and then transported to the jobsite. This is also useful when utilizing slip/jump forming techniques for improving construction time and efficiency.įind out more about nVent LENTON Form Saver Couplers and Accessories to improve reusability. This prevents damage to costly forms, and makes their removal process faster and safer. During segmental pours, with the right coupler or accessory, load path continuity can be maintained in rebar without dowel bars protruding through forms. Mechanical splices eliminate these congestion problems, leading to better concrete consolidation and will make the overall job more cost effective through minimized job site problems.Ĭouplers can be more efficient by enabling forms to be reused. Lap splicing increases rebar congestion at the lap zone and is one of the major causes for forming rock pockets and voids in the concrete. Speaking of space being at a premium, rebar couplers allow for designs to be less congested. Longer rebar length or an increased amount of rebar needed to meet code requirements increases not only the supplied material cost, but also can increase the cost of freight, fabrication and the efficiency when space is at a premium. This reduced column size results in a more efficient design and an optimum use of floor space. Using mechanical splices allows the option of larger diameter rebar in a smaller column while minimizing congestion. Working with “small” diameter reinforcing bars may require the use of larger column dimensions to accommodate a greater quantity of bars. The larger the rebar size, the more cost efficient mechanical couplers become in the overall cost of a project. This means a more material-efficient design for engineers, reducing rebar lengths while improving structural integrity and minimizing the total amount of steel needed for a project. Mechanical couplers allow the butt splicing of rebar, without the need to overlap. When comparing the cost of using mechanical couplers against lap splicing, there may be several hidden costs in lap splicing that should be considered for a true apples to apples comparison With all of those considerations, each design choice has a unique tradeoff with all of the other design choices. In a previous post, we considered the basic design considerations of a lap splice design compared to mechanical splices, such as the grade of steel, surface condition of the bar, size of bars, grade of concrete, position of the splice with respect to concreting and design loads. In this blog, we will look at some of the maybe not-so-obvious advantages of using mechanical rebar splices versus lap splicing when comparing the total installed cost for a project. More and more engineers are specifying mechanical rebar connections over lap splices because mechanical connections afford a reliability and consistency that can’t be found with lap splicing. But as many structural engineers, architects and specifiers have discovered, lap splicing has very few advantages and quite a few disadvantages when compared to mechanical couplers. For many years, lap splicing has been the traditional method of connecting reinforcing bars.
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