How far apart are the guardrail posts?
The spacing between two guardrail posts depends on the applicable standard and the specific road type.
Chinese Standard (JT/T 281):
| Road Type |
Post Spacing |
| Ordinary highways |
4 meters (4,000mm) |
| Expressways / Highways |
2 meters (2,000mm) |
US Standard (AASHTO M180 / MASH):
| Post Spacing |
Typical Application |
| 3.81 meters (12.5 ft) |
Standard W-beam guardrail |
| 1.905 meters (6.25 ft) |
High-impact or reinforced sections |
Notes:
- Post spacing affects the overall stiffness and impact performance of the guardrail system.
- Shorter spacing (e.g., 2m or 1.905m) provides higher impact resistance and is used in high-risk zones.
- Longer spacing (e.g., 4m or 3.81m) is more economical and suitable for standard road sections.
- We can supply guardrail posts, spacer blocks, and beams configured to your project's required spacing and standard.
If you are unsure which spacing is right for your project, please contact our team with your road type and applicable standard — we will recommend the correct configuration.
