What is the difference between RSJ & Z-posts for Crash Barriers, and which do I need?

The choice comes down to the environment and budget:

• RSJ Posts (Rolled Steel Joist): These feature an ‘H’ or ‘I’ cross-section. They are incredibly rigid, heavy-duty, and offer maximum resistance. If you are protecting high-value machinery, structural building columns, or dealing with heavy HGVs, RSJ is the industry standard.

• Z-Posts: These are manufactured from lighter steel folded into a ‘Z’ shape. They are designed to bend and absorb energy progressively during an impact, making them highly cost-effective for lower-speed environments like car parks or commercial perimeters.