Article 1 — Description
Repair guard fence elements, posts, terminal anchor sections, single guard fence terminals, and other appurtenances .
Article 2 — Materials
Furnish the following materials, unless otherwise shown on the plans: rail elements, posts, blockouts, fittings, and anchor concrete in accordance with Item 540, “Metal Beam Guard Fence” ; single guardrail termi nal (SGT) in a ccordance with Item 544, “Guardrail End Treatments”; steel posts with base plates or terminal anchor posts to match original design, in accordance with ASTM A36 or better; paint as required; concrete for structural repair in accordance with I tem 429, “Concrete Structure Repair”; grout meeting the requirements of the current metal beam guard fence mow strip standard general notes; and backfill material as approved. Pick up materials furnished by the Department at the locations shown on the plans. Load and deliver furnished material to the project location. Pick up Department -furnished materials during normal business hours.
Article 3 — Work Methods
Replace guard fence, including thrie beam, curb, and transitions, in accordance with Item 540 and as shown on the plans or as directed. Work requests are made on a callout basis. Begin physical work within 72 hr. of notification, unless otherwise shown on the plans. Replace end treatments in accordance with Item 544 and as shown on the plans or as directed. Weld in accordance with Item 448, “Structural Field Welding.” Repair concrete in accordance with Item 429. Remove guard fence in accordance with Item 542, “Removing Metal Beam Guard Fence.” Replace rail and posts removed during the same workday, unless otherwise approved. Protect traffic from exposure to unattached rail elements left overnight, as approved. Cover or fill post holes at the end of each day. Place rail to a smooth line and grade, with posts plumb to the correct height, as shown on the plans. Rem ove salvageable rail elements in original lengths. Remove fittings from posts and rail elements. Deliver salvageable materials to a designated stockpile site and neatly stack as directed. Re use salvageable materials in the repair as approved. Dispose of debris and damaged components in conformance with all federal, state, and local regulations.
3.1 Replace Rail Element . Remove and replace rail elements as directed. Bolt rail elements end- to-end and lap
in the direction of traffic in the lane adjacent to the guard fence. Provide prefabricated curved rail when 1000 needed. Field- drill or punch to create holes for special details. Tighten nuts. Replace bridge end connection when required, in accordance with Item 540.
3.2 Replace Short Radius System (TL -2 or TL- 3). Remove and replace short radius rail systems as directed.
3.3 Replace Timber or Steel Post . Remove and replace posts as directed. Dispose of any concrete removed.
Drill new post holes as needed. Clean post holes free of loose dirt and debris, and thoroughly compact bottom of hole to the correct embedment depth for placement of post. Place post to the correct alignment, elevation, and plumb. Backfill with select material by thoroughly compacting material to the density of adjacent undisturbed material. Replace concrete foundations only as directed. Use grout to fill space between riprap and posts when replacing posts.
3.4 Realign Posts . Realign existing posts to a smooth line and grade.
3.5 Repair Terminal Anc hor Post . Repair the steel anchor post by straightening or welding to the existing post
above the concrete foundation.
3.6 Replace Terminal Anchor Posts . Remove and replace damaged anchor posts with foundation or install
new anchor posts with foundation. Remove anchor and clean existing holes or drill new holes, as approved.
3.7 Remov e Obsolete Guardrail End Treatment and Replace with SGT . Remove damaged guard fence end
treatment and replace with complete new SGT.
3.8 Remove Obsolete Guardrail End Treatment . Remove damaged guard fence end treatment .
3.9 Replace SGT Components . Remove damaged SGT components and replace with new components.
Salvage and reuse components as approved.
3.10 Repair Steel Post with Base Plate. Replace damaged steel posts with base plates. Drill anchor holes and
install new bolts or weld new anchor bolts to existing bolts as directed. Field- weld in accordance with Item 448, or shop- weld in accordance with Item 441, “Steel Structures.” Repair damaged galvanized coating in accordance with Section 445.3. 4., “Repairs.”
3.11 Raise Rail Element. Raise rail as shown on the plans.
3.12 Replace Blockouts . Remove and replace damaged or deteriorated blockouts with new blockouts when
shown on the plans or as directed.
Article 4 — Measurement
This Item will be measured as follows .
4.1 Replace Rail Element (W -Beam or Thrie -Beam) . By the foot along the face of the rail from center to center
of the slotted hole at each end of the rail elements to be replaced, excluding the terminal anchor section, the rail with any bolt hole spacing, and the first two rail elements of the SGT section.
4.2 Replace Rail Element (Thrie- Beam Transition to W -Beam) . By each transition.
4.3 Replace Short Radius System (TL -2 or TL- 3). By each short system radius.
4.4 Replace Timber or Steel Posts (Without Concrete Foundation) . By each post replaced.
4.5 Replace Timber or Steel Posts (with Concrete Foundation) . By each post replaced.
4.6 Realign Posts . By each post realigned.
1001 4.7. Repair Terminal Anchor Post . By each post repaired.
4.8 Replace Terminal Anchor Posts. By each post replaced.
4.9 Remove Obsolete Guardrail End Treatment and Replace with SGT. By each SGT.
4.10 Remove Obsolete Guardrail End Treatment. By each end treatment .
4.11 Replace SGT (Impact Head). By each head.
4.12 Replace SGT (Rail). By the foot from center to center of posts, two rails.
4.13 Replace SGT (Post ). By each post replaced, including metal sleeves.
4.14 Replace Blockouts. By each blockout replaced.
4.15 Repair Steel Post with Base Plate. By each post repaired. Includes top or side mount posts.
4.16 Reset SGT Impact Head . By each head reset.
4.17 Replace SGT ( Object Marker ). By each marker replaced, as directed, including the removal and disposal of
the existing rubber bumpers.
4.18 Replace SGT (Cable Anchor ). By each cable anchor replaced.
4.19 Replace SGT (Cable Assembly) . By each cable assembly replaced.
4.20 Replace SGT ( Strut ). By each strut replaced.
4.21 Raise Rail . By the foot along the face of the rail from center to center of the slotted hole at each end of the
rail element raised.
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Replace Rail Element ” of the type specified, “Replace Short Radius System” of the type specified, “Raise Rail ” of the type specified, “Replace Post ” of the type spec ified, “Repair Post ” of the type specified, “Realign Posts ” of the type specified, “Remov e Obsolete Guardrail End Treatment and Replace with SGT,” “Remov e Obsolete Guardrail End Treatment,” “Replace SGT” of the type specified, “Reset SGT Impact Head,” “Replace Blockouts,” and “Repair Steel Post with Base Plate.” This price is full compensation for repairing rail and furnishing equipment, materials, labor, tools, and incidentals. Realignment of existing rail without removing will not be paid for directly but will be subsidiary to realigning posts. Replacement of concrete riprap around posts, removal and replacement of curbs, and bridge end connection will not be paid for directly but will be subsidiary to the various bid i tems. Replacement of SGT components not mentioned above will not be paid for directly but will be subsidiary to the various bid items. Concrete repair will be paid for in accordance with pertinent Items. Payment for repair of steel posts with base plate includes work performed above the concrete foundation. Any rail removed and replaced to remove and replace posts will not be paid for directly but will be subsidiary to various bid items. Coring new holes and furnishing new bolts and epoxy for the repair or replacement of posts with base plate will be subsidiary to various bid items.