What are South Carolina Temporary Concrete Barrier General Notes?

Tips & Advice

South Carolina Department of Transportation’s temporary concrete barrier general notes are as follows:

Fabrication Requirements

  1. All approved temporary concrete barrier walls should comply with the standard drawings and the requirements of NCHRP Report 350. All acceptable barrier wall designs are included on the “Approved Products List for Traffic Control Devices in Work Zones” maintained by traffic engineering. All manufacturers of approved temporary concrete barrier walls and their barrier wall products should obtain inclusion on the “Approval Sheet 54 Temporary Concrete Barrier Producers” maintained by the Office of Materials and Research. Omission of either the barrier wall design or the manufacturer from these lists will disqualify a barrier wall design for use on a SCDOT project.

  2. Temporary concrete barrier walls should be constructed of Class 3000 concrete unless otherwise specified. Reinforcing steel should be ASTM A-706, low-alloy steel deformed and plain bars for concrete reinforcement, Grade 60.

  3. ASTM A-36 steel should be used for the connection. Fabricate all connection hardware as detailed.

  4. A 4” white PVC sleeve may be used to form the lifting hole if the sleeve is left in place.

  5. The temporary concrete barrier walls should have the SCDOT 350 approval stamp, “SCDOT 350 XX 00 00” imprinted on top of each section of barrier wall, but no closer than 12” from either end of each section of barrier wall, unless otherwise directed by the Department.

  6. Acceptance of the temporary concrete barrier wall is dependent upon the successful inspection of the manufacturer’s plants and the manufacturing process of the products by representatives of the Department’s Office of Materials and Research. The manufacturer will imprint the date of acceptance on top of each section of barrier wall as part of the approval stamp.

Installation Requirements

  1. All temporary concrete barrier walls are subject to inspection and approval by the Engineer prior to installation.

  2. Install the temporary concrete barrier wall the maximum distance from the near edge of the adjacent travel lane while providing sufficient space to conduct the work.

  3. All temporary concrete barrier walls installed in a continuous line should be the same shape, length and connection type.

  4. Improperly placed approach tapers and temporary concrete barrier ends can be hazardous to motorists. Crash severity may be amplified depending upon a vehicle’s speed and angle of impact. Provide protection to minimize the possible hazardous conditions of the approach areas and the barrier ends.

  5. A portable terminal impact attenuator should comply with all requirements as specified by the standard specifications unless otherwise directed by the Department. Each attenuator should be one of three types. Selection of the proper unit should be determined by the performance characteristics of the unit in correlation with the posted regulatory speed limit of the adjacent roadway prior to installing the permanent construction signs and initiating construction activities.

  6. When placing temporary concrete barrier walls on a bridge deck to provide a temporary railing, anchor the barrier wall to the bridge deck to minimize the potential for displacement that could render the wall ineffective. Anchor the wall to the deck where there is 8’ or less of deck between the wall and the nearest edge of the deck.

  7. When connecting the end of a line of temporary concrete barrier wall to a structure, install and stabilize the last two sections of the wall to minimize movement of the ends as directed by the standard drawings for road construction.

  8. Utilize and install only those temporary concrete barrier walls designed for anchorage and included on the approved products list.

  9. Only install anchors on the traffic side of the temporary concrete barrier wall.

  10. Install each anchor in accordance with SCDOT requirements regarding anchorage of temporary concrete barrier walls to bridge decks.

  11. Attach the small delineators to the sides of the temporary concrete barrier wall as detailed in the standard drawings for road construction. Attach large delineators to the tops of the temporary concrete barrier walls as detailed in the standard drawings.

  12. Color each section of the temporary concrete barrier wall “bright white.”

  13. Refer to details, notes and quality items as provided and specified by the standard specifications.

  14. During high speed angle impacts greater than 10 degrees, a deflection of the barrier wall is likely to occur. However, deflection may occur during any impact. Therefore, do not place equipment within 6’ of a barrier wall when space is available to minimize risk factors.

  15. The pay items should be listed as: Temporary Concrete Barrier L.F.

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