Everything you Need to Know About an RSJ

steels being installed on site article

An RSJ, or Rolled Steel Joist, is a popular construction component used in many buildings and structures. RSJs are essentially beams made from rolled steel and are designed to provide structural support.

In this article, we will discuss everything you need to know about an RSJ, including its characteristics, uses, and benefits.

Characteristics of an RSJ

RSJs are known for their strength and durability. The shape of an RSJ is similar to that of an I-beam, with a central web and two horizontal flanges on either side. This design allows the RSJ to support a large amount of weight, making it a popular choice for construction projects.

Uses of an RSJ

One of the most common uses of an RSJ is to support the weight of a building or structure. RSJs can be used as load-bearing walls, floor joists, and roof beams. They are also frequently used in bridge construction, as well as in the manufacturing of heavy equipment and machinery.

Benefits of an RSJ

There are several benefits to using an RSJ in construction projects. For one, they are incredibly strong and can support large amounts of weight, making them ideal for use in heavy-duty applications. RSJs are also highly versatile and can be used in a wide range of construction projects.

Another benefit of RSJs is their durability. Unlike other building materials that can be prone to warping or bending over time, RSJs are designed to maintain their strength and structural integrity for many years. This means that they are a cost-effective choice in the long term, as they require little maintenance or repair.

Finally, RSJs are relatively easy to install, making them a popular choice for builders and contractors. They can be cut to size on-site, which means that they can be customized to fit the specific requirements of a given project. Additionally, RSJs can be easily bolted or welded into place, making them a quick and efficient option for construction projects.


RSJs are an important component of many construction projects, providing the strength and support necessary for a wide range of applications. With their durability, versatility, and ease of installation, RSJs are a popular choice for builders and contractors around the world. Whether you are constructing a new building or replacing an old load-bearing wall, an RSJ can provide the support you need to get the job done right.