Traditionally, rebar is held together by tying it with tying wire; thin steel wire. Yet we regularly get the question whether reinforcing steel can be welded. Understandable question, as welding can offer advantages such as efficiency and cost savings.
Unfortunately, the answer is not a simple yes or no. In this article, we will outline the answer as to whether welding reinforcing steel is a suitable option and what the considerations are when performing this technique.
Welded products have been on the market for a long time. These are machine or manually welded under controlled conditions. That way, the infringement on the tensile strength of the reinforcement is minimal. And of course, this is also regularly checked in the factory by doing tensile and shear tests. For example, during the production of rebar cages and reinforcing mesh.
On site, it is more difficult to create such a controlled environment. In order to maintain the properties of the steel, it is essential to use a certified welder for this purpose and to carry out tests to check the retention of tensile strength here as well.
When considering the use of welding as an alternative to rebar tying, be aware of the potential risks. Applying a weld instead of tying wire should be done in a way that minimises damage to the rebar from the heat generated during welding. The heat input can change the mechanical properties, such as tensile strength, of the rebar.
The tack weld is a tie-wire replacement weld. It has no structural function, but serves to hold the reinforcement in place during the assembly and pouring of concrete. Maintaining strength is crucial.
Yes, it can be done. Under very strict conditions, when you take the right precautions and follow procedures to maintain the strength and durability of the structure.
Our advice: always get a certified welder for this job, with expertise to ensure that the tensile strength and structural value of the reinforcement are maintained. Otherwise, you run the risk of reducing the tensile strength of the reinforcement and lowering its structural value.
This is not a risk you want to run. Welding rebar is a technique that offers potential benefits, such as efficiency and cost savings, but it requires close monitoring to ensure the structural value of the rebar.
It is essential that the right procedures are followed and that there are sufficient guarantees of proper execution and continuous monitoring.
