Guardrails
Guardrails are structural systems installed along highways or bridges to provide both traffic guidance and impact force reduction through the deformation capacity of the system.
The products are manufactured in compliance with the following standards:
- American Standard – AASHTO LRFD (American Association of State Highway and Transportation Officials LRFD)
- Vietnamese Standard – TCVN 11823-13:2017: Highway Bridge Design
- American Guardrail Design Standard – AASHTO M180: Standard Specification for Steel Components for Highway Guardrail
- European Standard – EN 1317: Road Restraint Systems
- TCVN 12681:2019: Road Traffic Safety Facilities.
Product Features
The products are available in two types:
- Bridge guardrails
- Highway guardrails
The system consists of the following components:
- Posts: Available in circular or square tubular sections, with height and foundation embedment depth designed in accordance with applicable standards.
- Spacer blocks: Formed from steel plates and used to connect the posts and guardrail beams through bolted connections.
- Guardrail beams: Roll-formed from steel plates, available in two-wave or three-wave profiles.
- Bolts: Including hex-head bolts and round-head bolts.
Material standards:
- Steel posts: Manufactured in accordance with ASTM A36, ASTM A572 Grade 42, ASTM A53/A106 Grade B, or equivalent standards.
- Guardrail beams: Manufactured in accordance with ASTM A572 Grade 50, Q345/Q355B GB/T 1591, or equivalent standards.
- Bolts: Manufactured in accordance with ASTM A307 Grade A, ASTM F3125 Grade A325, DIN 931, DIN 7380, or equivalent standards.
- The products are hot-dip galvanized in accordance with ASTM A123.
- Bolts are hot-dip galvanized in accordance with ASTM A153.
- All welding works are performed in accordance with ANSI/AWS D1.1:2020 (Structural Welding Code – Steel).
