620GUIDE RAIL

620.1DESCRIPTION—This work is construction of new guide rail of the type indicated, re-setting of existing

guide rail, removal of a concrete end anchor, and removal of existing guide rail, including all appurtenances and hardware.

620.2MATERIAL—

• Plain Cement Concrete Curb. Section 630.2

• Plain Concrete Mountable Curb. Section 633.2

• Class A Cement Concrete. Section 704

• No. 57 Coarse Aggregate. Section 703.2

• Reinforcement Bars. Section 709.1

• Rock, Class R-3. Section 850

• Delineators. Section 937.2(b)

• Reflective Sheeting. From a manufacturer listed in Bulletin 15, as shown on the Standard Drawings, and as specified in Section 1103.05.

620.3CONSTRUCTION—As shown on the Standard Drawings and as follows:

clear objects or to fit between fixed ends. Use bolts that are long enough to extend at least 1/4 inch beyond the nuts. Draw bolts tight, except if required for expansion. Before installation, apply acceptable galvanizing paint to repair portions of posts to be placed underground. After installation, apply two coats of the galvanizing paint to guide rail or related appurtenances, including threaded portions of fittings, fasteners, and the cut end of bolts, that have been abraded or cut, exposing the base metal. If guide rail is installed under traffic conditions, conform to the following requirements:

• Perform work only within those areas protected by temporary traffic control devices.

• Attach guide rail on posts driven during the day, before the end of that day.

• Provide satisfactory protection at exposed, unfinished ends of guide rail.

Join new and existing guide rail, if required, as indicated, or directed. Construct concrete parts of guide rail, if required, as specified in the applicable parts of Section 1001.3.

not batter, burr, separate galvanizing from steel, or distort the post. As directed, remove and replace posts bent or otherwise damaged. Install offset brackets, if required. In areas where random boulders are encountered and the post cannot be driven to grade, remove the post, then drill or excavate a hole of suitable dimensions and depth to place the post at grade as shown on the Standard Drawings. After the hole has been drilled, remove all fragments and soil from the hole. Provide containment if required to keep additional soil and rock fragments from entering the hole at no additional cost to the Department. Reset the post and backfill to the ground line, using No. 57 Coarse Aggregate and/or an acceptable embankment material as directed , thoroughly compacted in 6-inch layers with a handheld tamper as shown on the Standard Drawings. In areas where bedrock is encountered, and the post cannot be driven to grade, remove the post, then drill or excavate a hole of suitable dimensions to the required depth. After the hole has been drilled, remove all fragments and soil from the hole. Provide containment if required to keep additional soil and rock fragments from entering the hole at no additional cost to the Department. Reset the post and backfill to the ground line, using No. 57 Coarse Aggregate and /or an acceptable embankment mater ial as directed , thoroughly compacted in 6-inch layers with a handheld tamper as shown on the Standard Drawings. If an underground feature, such as a low-fill culvert or underground utility line, prevents post(s) from being driven, posts may be skipped up to a 25-foot span as shown on the Standard Drawings.

cantilever from the 5/16-inch mounting bolt. Rest the free end on temporary 1/2-inch support bolts and nuts or temporary drift pins until the 5/16-inch mounting bolts are torqued. Splice by lapping in the direction of traffic. Provide full contact between the rail elements in the overlap, between the center and both edges of the element, and between the bracket or post, as the case may be. Use suitable shop-formed guide rail or rubbing rails on curves having a radius of less than 150 feet.

transition types. Do not install on strong post connection bolts.

Anchors, and End Treatments. Install, where indicated.

reinforcement bars, anchor bolts, nuts, and washers.

in Section 630.3.

specified in Section 630.3.

end guide rail transition at structure barrier, without curb, with curb and inlet, with curb and inlet near bridge barrier or with curb as indicated, and as shown on the Standard Drawings.

guide rail transition at structure barrier, without curb, with curb and inlet , with curb and inlet near bridge barrier or with curb as indicated, and as shown on the Standard Drawings.

trailing end guide rail transition at structure barrier, without curb, with curb and inlet, with curb and inlet near bridge barrier or with curb as indicated, and as shown on the Standard Drawings.

end guide rail transition at structure barrier, without curb, with curb and inlet, with curb and inlet near bridge barrier or with curb as indicated, and as shown on the Standard Drawings.

on the Standard Drawings . Do not reset posts in same locations. The Department must approve the condition of the in -situ barrier components to determine if they are able to be reused. Ensure guide rail conforms to the Standard Drawings, including guide rail height and splice locations. Replace steel offset brackets and backing plates with routed wood, plastic, or composite offset brackets from a supplier listed in Bulletin 15. Properly dispose of steel offset brackets and backing plates. Repair or replace rail element, posts, hardware, or other materials damaged during this operation. When resetting posts for Type 2 Weak Post guide rail, replace posts that are less than 65 inches in length.

repair work, except for the material that the Representative determines salvageable for Department use. Satisfactorily backfill holes in preparation of driving new posts, as required.

indicated, and then dispose of the material outside the right of way.

by the Department. Carefully remove the existing guide rail from locations indicated. Completely dismantle, unbolt, and remove guide rail in a manner that allows reuse of the components from locations indicated. Do not disassemble by burning or cutting. Neatly bundle the galvanized steel posts, offset brackets, and galvanized rail elements. Separate the individual elements, (rail elements, posts, offset blocks) as directed. Bundle and deliver to designated stockpile. The proposal/contract will include a special provision that identifies where the guide rail is to be stockpiled, as well as the approximate distance (miles) from project site to designated stockpile location. Advance notification of a scheduled delivery of guide rail to designated stockpile is to be provided to the individual whose name and telephone number are listed in the special provision.

locations indicated. Backfill anchorage area with suitable material.

1.a Provide at least one trained guide rail installer present at each location within the project to be an active participant during the installation, replacement, and repair of guide rail system or elements of a guide rail system. The trained installer must be a foreman or crew chief overseeing the installation by field crew.

1.b The trained installer(s) must attend the Department’s Guide Rail Installation, Replacement, and Maintenance Course and receive a Training Certificate by passing the final examination. Alternatively, installers can attend the American Traffic Safety Services Association (ATSSA) Guardrail Installation Training course and acquire a training certificate with a valid expiration date.

1.c The trained installer must provide an unexpired Training Certificate to the Representative before starting physical work.

2.a Provide at least one trained installer present at each location within the project to be an active participant during the installation, replacement, and repair of a proprietary roadside safety hardware system. The trained installer must be a foreman or crew chief overseeing the installation by field crew.

2.b The trained installer(s) must attend the Department’s Proprietary Traffic Barrier & End Treatment Course, or any respective manufacturer’s training course, and receive a Training Certificate from the manufacturer for the installation, replacement, and repair of the proprietary product(s) by completing the manufacturer’s requirements. Certificate must identify the specific device for which it is issued and the expiration date.

2.c The trained installer(s) must provide an unexpired proprietary product(s) Training Certificate to the Representative before starting physical work. A certificate issued for one product will not be accepted for the installation, replacement, or repair of another product.

620.4MEASUREMENT AND PAYMENT—

For the type indicated. Includes nested guide rail as indicated. In areas where random boulders or bedrock are encountered, the price includes drilling or excavating holes, and backfilling to the ground line, using No. 57 Coarse Aggregate and/or an acceptable embankment material.

Reflective sheeting as specified in Section 1103.05 is incidental.

The price includes steel foundation tubes, short breakaway timber posts, ground strut, terminal rail element, soil plate, anchor cable bearing plate, post sleeve, anchor plate, swaged cable assemblage, hex bolts, washers, nuts, and terminal section, single.

The price includes height adjustment, W -beam splice location adjustments, new offset brackets and backing plates.

If guide rail is retained by the Department, the unit price includes the cost of delivering guide rail material to the designated stockpile.

For the type indicated.

The price includes steel foundation tubes, short breakaway timber posts, ground strut, terminal rail element, soil plate, anchor cable bearing plate, post sleeve, anchor plate, swaged cable assemblage, hex bolts, washers, and nuts.

The price includes W-beam rail elements, long breakaway timber posts, hex bolts, washers, and nuts.

The price includes connection plates, square washer plates, filler plates, bolts, washers, and nuts.

The price includes bolts and nuts.

The price includes W-beam rail element, posts, steel plates, square washers, bolts, and nuts.