Nesting Menu
Ordering, Design and Installation
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NCHRP Project 22-23 will update this useful, but older manual
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ATSSA has developed a Guardrail Installation Checklist. Order here.
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Maryland Guidelines of Traffic Barrier Placement & End Treatment Design
Need help with a takeoff or placing an order?
It is important we know the following to ensure you get the product you need the first time:
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Is this a state or non-state job (state-tested inventory cannot be shipped non-state jobs).
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If it is a state job, what is the project information?
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How many runs are there?
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Is the rail blocked out?
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Do you need radiused rail? How many curves? Length? Radius of each?
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Steel or timber posts?
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Are there low-fill culverts that will require base-plated posts? How thick is the culvert "top"?
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What end treatments do you need? TAS?, FEW?, SGT Type I, II, or III?
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To what type of concrete railing are we attaching the transitions?
Concave: Bowing away from the traffic lane
Convex: Bowing towards the traffic lane
To find the Radius for a curved rail:
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Step 1: Starting at the last post in the straight run (point A), lay
cloth tape along the path that the curved guide rail will follow. -
Step 2: Mark-off two points along the curved cloth tape: one at 6'-3", (point B) and the second at 12'-6" (point C).
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Step 3: Pull string directly from starting point (point A) to the second mark-off point (point C).
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Step 4: Measure from the first marked-off point (point B) over to the mid-point of the taut string. this measurement (D) is the rise or "middle ordinate."
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Step 5: Check the chart to find the Radius (R), given the Rise (D).
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Example: a Rise of 3 7/8" inches would result in a Radius of 60 feet.
