RSJ vs Z Posts: What’s the Difference for Armco Barrier Systems?
Choosing the right support post is one of the most important decisions when installing an Armco barrier system. The two most common options are RSJ posts and Z posts — but they serve very different purposes.
Understanding the difference between them will help you choose a setup that matches your environment, impact risk, and budget.
What are RSJ Posts?
RSJ (Rolled Steel Joist) posts are heavy-duty steel support posts designed for maximum strength and impact resistance.
They are typically used in high-risk environments where vehicles, forklifts, or heavy machinery operate close to barrier systems.
Key Benefits of RSJ Posts:
- Extremely strong and durable
- Designed for high-impact protection
- Ideal for industrial environments
- Long-lasting in demanding conditions
What Are Z Posts?
Z posts are lighter-weight support posts designed for lower-impact environments or areas with limited space.
They still provide reliable support but are more suited to situations where heavy-duty protection isn’t required.
Key Benefits of Z Posts:
- More cost-effective than RSJ posts
- Easier to install and handle
- Ideal for tighter spaces
- Suitable for lower-impact areas
Dig-In vs Bolt-Down Posts: What’s the Difference?
Dig-In Posts (Below Ground Installation)
- Installed directly into the ground using concrete
- Provides maximum strength and stability
- Ideal for high-impact areas with heavy vehicle traffic
- More permanent solution with longer installation time
Best for:
Warehouses, logistics yards, roadside installations, and high-risk environments
Bolt-Down Posts (Surface Mounted)
- Fixed to existing concrete using anchor bolts
- Faster and easier to install
- Ideal where digging isn’t possible
- Slightly less impact resistance compared to dig-in posts
Best for:
Car parks, indoor areas, existing concrete floors, and lower-impact zones
Need Help Choosing the Right Setup?
If you’re unsure which post type is best for your site, it’s worth considering factors like traffic levels, layout, and risk areas before making a decision.
Choosing correctly from the start will save time, reduce costs, and improve safety across your site. Also feel free to drop us a call on the number 01752 710100
