Types of Guardrail Used on Highways

Guardrails are a type of road safety equipment installed to help reduce the risk of vehicles veering off the roadway and entering hazardous areas. They are commonly found on highways, particularly at locations such as curves, bridges, slopes, and roadsides with significant elevation changes.

Guardrails come in various types and configurations, selected based on road conditions and safety system requirements. Below are some commonly used types:

1. W-Beam Guardrail
The W-Beam is one of the most recognizable forms of guardrail. Its steel panels feature a profile resembling the letter "W" and are mounted lengthwise onto support posts.

This profile is designed to provide specific performance characteristics when the system absorbs a vehicle impact. W-Beams are widely used across various road sections due to their relatively simple construction and the ability to replace individual components following damage.

2. Thrie-Beam Guardrail
The Thrie-Beam features a taller profile than the W-Beam, with a shape resembling three waves.

This configuration is suitable for specific road conditions that require different safety system characteristics. Selection must align with the project's design and technical specifications.

3. Guardrails with Support Posts
Guardrail systems consist of more than just steel panels; they also utilize support posts that maintain panel positioning and provide structural support during impacts.

Post types and sizes vary depending on the system design, materials used, and installation conditions.

4. Bridge Guardrails
Safety systems on bridges must account for structural conditions and the risk of vehicles leaving the roadway.

Guardrails or bridge-side safety systems may employ specialized configurations tailored to the bridge structure and the specific safety requirements of the location.

5. Median Guardrails
Guardrails can also be installed in medians to help separate traffic flows or protect against vehicles veering out of their lanes.

The system used must be adapted to the median width, traffic direction, and road characteristics.

6. Guardrails for Sloped Areas
Roadsides featuring slopes or elevation changes may require additional protection. Guardrails can be installed as a barrier between the traffic lane and the area outside the roadway. Determining the installation location requires consideration of terrain conditions and road safety design.

7. Guardrail Terminals or End Treatments
Guardrail ends require special attention, as the panel ends cannot be treated the same way as the central sections of the system.

Guardrail terminals are designed to finish the system's ends and serve a specific safety function. The type of terminal used must align with the system design and applicable technical specifications.

Factors to Consider
Selecting a guardrail type involves more than just the panel shape. Key considerations include:

Road conditions and geometry.

Traffic speed.

Types of passing vehicles.

Terrain conditions.

Distance to hazards.

System type and required performance level.

Project standards and technical specifications.

Conclusion
The type of guardrail used on roadways varies based on panel shape, system configuration, and installation location. W-Beam and Thrie-Beam are examples of panel profiles used in road safety systems, while other configurations can be adapted for medians, bridges, sloped areas, and specific road conditions.

Guardrail selection should take into account not only the material but also the system design, site conditions, installation methods, and applicable technical standards.

Need Guardrails for Your Project?
PT Intisumber Bajasakti supplies a wide range of construction and infrastructure materials, including guardrails for project requirements.

📞 Tel: 021-66675999
🌐 Website: www.intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

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