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Trinity Highway > Products > Guardrail > W-Beam & Thrie-Beam Systems > W-Beam & Thrie-Beam Systems

W-Beam & Thrie-Beam Systems

Rail sections specified to be installed on curves having a radius of 5 feet (1.5 m) to 150 feet (45.7 m) can be curved in our fabrication facilities prior to delivery. Rail can be curved either convex or concave as required. Terms convex or concave refer to the direction curved, outward or inward, relative to the traffic face of the rail.

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Radius Rail

How To Find The Radius For A Curved Rail

The diagrams & chart provide date for locating posts and curves.

  • STEP 1: Starting at the last post in the straight run (point A), lay cloth tape along the path that the curved guardrail will follow.
  • STEP 2: Mark-off two points along the curved cloth tape: One at 6’-3”, or 1905 mm (point B) and the second at 12’-6” or 3,810 mm
    (point C).
  • STEP 3: Pull string directly from starting point (point A) to the second mark-off point (point C).
  • STEP 4: Measure from the first mark-off point (point B) over to the mid-point of the taut string. This measurement (D) is the Rise.
  • STEP 5: Check the chart to find the Radius (R), given the Rise (D). Example: a Rise of 4 inches (102 mm) would result in a radius of 60 feet (183 m).

 

Note: Follow the steps for each piece of rail section in the curved run. The arc may not be consistent and each consecutive piece of rail may differ in radius from the previous one. Please consult with an individual approved by the governmental authority specifying and supervising the installation of the guardrail.

 

MSG Standard

 

 

Components are available in 12 gauge or 10 gauge as required (except where noted). Hot dipped galvanized fi nish only, per ASTM A123. Alternative guardrail systems are available for restricted roadway applications. Refer to State DOT Standards for additional details.

Rail End Sections

W-Beam & Thrie Beam Rail End Sections

 

Components are available in 12 gauge or 10 gauge as required (except where noted). Hot dipped galvanized fi nish only, per ASTM A123. Alternative guardrail systems are available for restricted roadway applications. Refer to State DOT Standards for additional details.

Transition Panels

 

 

Components are available in 12 gauge or 10 gauge as required (except where noted). Hot dipped galvanized fi nish only, per ASTM A123. Alternative guardrail systems are available for restricted roadway applications. Refer to State DOT Standards for additional details.

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