1. What is an RSJ?
An RSJ (Rolled Steel Joist) is a type of structural steel beam commonly used in construction to provide support for buildings, bridges, and other structures. They are also known as I-beams, H-beams, or universal beams.
2. What are RSJs used for?
RSJs are used in construction for load-bearing support, typically in applications such as:
- Supporting walls and floors in buildings
- Structural frameworks
- Bridge construction
- Loft conversions
- Extensions and renovations
3. What are the different types of RSJs?
The most common types of RSJs include:
- Universal Beams (UB): Also known as I-beams, they have a vertical web and horizontal flanges.
- Universal Columns (UC): Similar to universal beams but with equal or nearly equal dimensions in height and width.
- Parallel Flange Channels (PFC): A U-shaped beam with parallel flanges.
4. How do I determine the right size RSJ for my project?
The correct size depends on factors such as load requirements, span length, and building regulations. A structural engineer should be consulted to ensure the correct specifications are used.
5. What materials are RSJs made from?
RSJs are typically made from S355 structural steel, which provides strength, durability, and resistance to bending or deformation under heavy loads.
6. How much do RSJs cost?
Please see our prices list or call us on 01665 497513 for a quote.
7. Can I cut an RSJ to size?
Yes, RSJs can be cut to size using specialist equipment such as a bandsaw or an oxy-fuel torch. We can cut our RSJs to ± 3mm so please get in touch if you need a specific length.
8. Do I need planning permission or building regulations approval for RSJs?
If an RSJ is used in a structural alteration, such as removing a load-bearing wall, building regulations approval is required. A structural engineer or building inspector will need to assess the design and installation.
9. How are RSJs installed?
Installation involves:
- Measuring and preparing the space
- Supporting existing structures with props if necessary
- Placing the RSJ securely using lifting equipment
- Fixing it in place with appropriate bearings and supports
- Ensuring compliance with building regulations
10. Do RSJs require maintenance?
RSJs are low-maintenance but should be inspected periodically for rust, corrosion, or structural integrity, especially in damp environments.
11. Can RSJs be painted or coated?
Yes, RSJs can be painted or coated with protective finishes such as anti-rust primers, fire-resistant coatings, or galvanization to enhance durability. We have unpainted and red oxide primer beams available.
12. Can RSJs be used outdoors?
Yes, but they should be treated or coated to protect against weathering and corrosion, particularly in exposed environments.
13. How do you deliver RSJs?
We offer a kerbside delivery as we don't have a hiab/forklift on our lorries. It all needs to be handled off the lorry or forklift.
14. Do you offer welding or fabrication?
Unfortunately we do not offer any of these services. We can supply S275 Mild Steel Plate if needed. Contact us for more details.
