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The Different types of joints used by Welders

Welding is a complex process that requires skilled workers who are trained in different techniques and practices. One of the most important aspects of welding is understanding the different types of welding joints that are commonly used in steel fabrication. Welding joints are the points or edges where two or more pieces of metal or plastic are joined together using heat and pressure.

There are five common types of welding joints that are used in structural steel fabrication. These include the butt joint weld, tee joint weld, corner joint weld, lap joint weld, and edge joint weld. Each of these joints has its own unique characteristics and is used for specific applications.

Butt Joint Weld

The butt joint weld is one of the most popular types of welding joints. It is also known as the square-groove weld and involves joining two flat pieces of metal together in a side-by-side parallel design. This type of weld is relatively easy to master compared to other joints on this list and is often used in conjunction with bevel-groove and square-groove butt welds.

Tee Joint Weld

The tee joint weld is used when two metals cross at a 90° angle, forming a ‘T’ shape. This type of weld is considered a fillet weld, which means that it involves joining two pieces of metal together at an angle. A tee joint weld is also commonly made whenever a pipe or tube is welded onto a base plate.

Corner Joint Weld

Corner joint welds are typically used on the outer edge of metals and create a weld that comes together at right angles to form an “L” shape. This type of joint is particularly common in the sheet metal industry and is often used when fabricating box frames or box sections.

Lap Joint Weld

Lap joint welding is often used when two metals of different thicknesses need to be joined together. This type of weld is formed when two or more materials overlap, and the weld can be made on either side or even both if the job’s specifications require it.

Edge Joint Weld

Edge joint welding is regularly used when a fabrication job includes sheet metal parts that have flanging edges. This type of weld is placed at a location on the edge of the metal sheet before being made to attach the adjacent pieces of steel. Steel fabricators will often set the two sheets of metal side by side to weld the items on the same edge, producing a clean finish.

Where to get premium welding services ?

Steel Edge Fabrications UK Ltd is a reputable company that provides mobile welding services. Our team can undertake a range of custom steel fabrication jobs, including on-site fabrication and mobile welding. We can complete tasks for anything from arc welding or MIG welding a simple steel beam to assisting in constructing a bespoke, kit-form steel frame building for you to assemble.

Our coded welders provide a high-quality service, ensuring that your project is a success and has the best chance of a long lifespan. We understand that welding is a complex process, and that's why we only employ skilled workers who are trained in different techniques and practices. We have made a name for ourselves due to the professional services we provide, and we’d love to do the same for you.


Mobile welding is often completed on construction sites, and the weather can impact the work. Therefore, coded steel welders must prepare for unpredictable conditions. Depending on the situation, any of the welding joints mentioned above can be used. It is essential to plan the types of welding joints that need to be used in advance to ensure a successful project with a long lifespan.

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  • May 25 2023
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