96E03/29/06

S617-96E.doc

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  Use on all projects with guardrail work.

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**Section 617. - GUARDRAIL**

**Description**

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  Include subsection 617.01(a) when CRG guardrail is used.

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**617.01**

**(a)** [Delete the CRT designator and substitute the
following:]{.underline}

> CRG Curved W-beam guardrail and no blockout

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  Include subsection 617.01(d) when guardrail terminals are required.

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**617.01**

**(d)** [Delete the text and substitute the following:]{.underline}

Terminal section types are designated as follows:

> CRT Cable releasing terminal
>
> G4-BAT Back slope anchor terminal
>
> FAT-30 Flared anchor terminal, 30 feet long
>
> FAT-20 Flared anchor terminal, 20 feet long
>
> SBT-BAT Back slope anchor terminal
>
> Flared Straight or parabolic flared W beam terminal
>
> Tangent Tangent W beam terminal

**Construction Requirements**

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  Include the following when FLH metric standard M617-10, G4 W beam
  guardrail wood posts, M617-18, G4 W beam guardrail steel posts, or
  M617-60, steel-backed timber guardrail, type A & type B, is included in
  the plans.

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**617.03 Posts.** [Delete the text and substitute the
following:]{.underline}

Where pavement is within 3 feet of the guardrail, set posts before
placing the pavement.

Where it is not possible to maintain a 24-inch minimum distance between
the back of the guardrail post and the top of a slope 2:1 or steeper,
increase the post length to 8 feet.

Where an impenetrable object is encountered, use a short post. Treat
field cuts for wood posts with two coats of preservative treatment
applied with a brush or a sprayer. Do not place field cuts in contact
with the ground. Anchor short posts in concrete. Backfill and compact
the remaining hole with acceptable material.

Use only standard length posts in terminal sections.

Drive posts into pilot holes that are punched or drilled. The dimensions
of the pilot hole shall not exceed the dimensions of the post by more
than ½ inch. Set posts plumb, backfill, and compact.

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  When steel-backed timber rail is required, include the following:

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**617.04 Rail Elements.**

**(b) Timber rail.** [Add the following after the second
paragraph:]{.underline}

Field drill holes in the steel backing on curved sections or where
required to correspond to the field cut wood rails at joints. Do not use
a torch to cut holes.

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| Include the following subsection for all projects with guardrail      |
| terminals. Check with the maintaining agency to determine whether a   |
| specific terminal type (e.g., ET-2000, Best 350 or others) is         |
| required. If so, insert the specific terminal type/name in the blank. |
| Write a justification in the project file for use of a proprietary    |
| terminal. If the maintaining agency does not have a preference,       |
| insert either FLARED or TANGENT in the blank.                         |
|                                                                       |
| Determine the test level for the terminal type chosen and insert it   |
| in the blank (e.g., 2 or 3). Also include the appropriate drawings in |
| the plans.                                                            |
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**617.05 Terminal Sections.** [Delete the third paragraph and substitute
the following:]{.underline}

Use \_\_\_\_\_\_\_\_ terminals that meet Test Level \_\_. Submit
drawings from the manufacturer for the terminals according to Subsection
104.03.