Deformed Bars: How They're Made

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Deformed Bars: How They’re Made

October 3, 2022

Deformed bars are one of the most common materials that you can find around construction sites. This is for good reason, too – rebars, or deformed bars, continue to serve the construction industry’s engineers and architects very well ever since it entered mainstream use. Generally, engineers use deformed bars to reinforce the strength of concrete, increasing its durability against outside elements and daily wear and tear. However, you, as someone who might be requiring these as material for your project, may be wondering – how are deformed bars made?

How manufacturers make deformed bars

Manufacturers put deformed bars through several processes. In order, they melt, shape, bend, and cut the rebar. 


This is the first part of the process when it comes to creating rebar. When it comes to melting, manufacturers melt down steel at extremely high temperatures into liquid form. They then pull the liquefied steel through a mold or a round tunnel that would give the rebar its shape when it cools down and solidifies. 


After the steel cools down and is now in its new form, the shaping process begins. As there are different kinds of rebar out there, the method of shaping also varies depending on the order or what is needed. As an example, to make stainless steel rebar, manufacturers coat the steel with epoxy during the shaping process. This is to help it fight against corrosion more. This process could be very different depending on the kind of deformed bar the factory creates.


This is the next part of the process wherein the manufacturers test the deformed bar for its durability or reinforcing capabilities. Usually, the manufacturers do this, but certain laboratories that test construction materials for their properties may do so as well. In this part of the process, they “bend” the rebar. They apply a large amount of twisting force until it breaks to a sample of the batch of rebar to see if it is up to standard. Manufacturers or labs may also test the entire output in a different manner to make sure that all the bars are firm.


Suppliers and manufacturers cut rebar in the required size before shipping. Workers may also cut rebar on-site. Manufacturers often automate this process due to the large number of deformed bars in a batch. They ship the deformed bars out afterward, usually to construction sites or warehouses. On-site, inspectors may examine the deformed bar to ensure it is ready for construction.

Key takeaway

Deformed bars are affordable, durable, and strong – but it is also fairly easy to manufacture. It is for this reason that engineers use these bars so much in construction, especially in the Philippines. It is likely that your construction project will require this, so it is important to know how they are made.

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