Frequently Asked Questions

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A mechanical rebar coupler is a device that is used to connect two reinforcing bars (rebar) together, end-to-end. It is a type of mechanical splice that is used in reinforced concrete construction to simplify the process of connecting two pieces of rebar.

The mechanical rebar coupler typically consists of a steel sleeve that is threaded on the inside and is designed to be slipped over the ends of the two rebar being joined. The sleeve is then tightened using a wrench or torque wrench to create a strong, permanent connection between the two bars.

The rebar coupler works by gripping onto the rebar and transferring the load from one bar to the other through the sleeve. The coupler is designed to be stronger than the rebar itself, and the connection it creates is as strong or stronger than a traditional lap splice, which requires a significant overlap of the two rebar.

Mechanical rebar couplers offer several advantages over traditional lap splicing, including:

• Increased structural integrity: Mechanical couplers create a continuous connection between two reinforcing bars, resulting in improved structural integrity and load transfer capabilities. This eliminates the weakness and uncertainty of the lapped joints in traditional splicing, which can lead to cracks and reduced durability.

• Faster installation: Mechanical couplers eliminate the need for time-consuming and labor-intensive manual lapping of the rebar, resulting in faster and more efficient installation times.

• Reduced material wastage: Mechanical couplers do not require the additional length of rebar needed for lapped splices, which can lead to significant material wastage.

• Increased safety: The use of mechanical couplers reduces the need for workers to perform risky activities such as bending, cutting, and welding of reinforcing bars, which can result in a safer working environment.

• Cost savings: While the initial cost of mechanical couplers may be higher than traditional lapping techniques, the reduction in installation time, material wastage, and increased structural integrity can result in overall cost savings over the life of the project.

Our rebar couplers can be installed by simple screwing the coupler onto the threaded rebar. For non threaded coupler, a portable hydraulic tool will impress the coupler onto the rebar using a moulding die. 

At Dongyang Asia, we also provide rebar threading services and coupler stamping services within your project site for your convenience.

Our rebar couplers must meet several quality standards to ensure they are safe, reliable, and meet the required performance specifications. Some of the most common quality standards that mechanical rebar couplers must meet include:

1. ASTM A615/A615M - Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement: This standard specifies the minimum requirements for steel bars used in concrete reinforcement, including requirements for material properties, dimensions, and tolerances.
2. ACI 318 - Building Code Requirements for Structural Concrete: This code provides the minimum requirements for the design and construction of reinforced concrete structures, including requirements for mechanical rebar couplers.
3. ICC-ES AC308 - Acceptance Criteria for Post-Installed Mechanical Anchors in Concrete Elements: This criteria provides guidelines for the evaluation and testing of post-installed mechanical anchors, including rebar couplers

Here in Dongyang Asia, we have available test reports conducted locally and abroad for your reference. 

Yes. In fact, Dongyang Asia mechanical rebar couplers can be used in seismic applications and other high-stress environments, provided they meet the necessary performance specifications and have been properly tested and evaluated.

In fact, in some cases, mechanical couplers may be preferred over traditional lapped splices in seismic applications because they can provide a stronger and more reliable connection between reinforcing bars.

To ensure that mechanical rebar couplers are suitable for use in seismic applications or other high-stress environments, it is important to select couplers that have been specifically designed and tested for these conditions.