What are the Rhode Island DOT Unanchored Precast Concrete Barrier Specifications?

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The Rhode Island Department of Transportation outlines specifications regarding the proper dimensions of unanchored precast concrete barriers for temporary traffic control, including general notes, barrier plan designs, section A-A specifications, section B-B specifications, section C-C specifications, and elevation details.

*Please note that this blog post is an interpretation of Rhode Island Department of Transportation's specifications. Please consult with Rhode Island DOT's most recent requirements for definitive information.

Rhode Island Barrier General Notes

  1. Barriers should be in accordance with section 926 of the Rhode Island standard specifications.

  2. Bend rebars around a 1-3/8” pin

  3. R-1 bars should be fabricated continuously.

  4. R-2 bars should be fabricated with 2’-0” minimum laps as shown on the detail.

Rhode Island Concrete Barrier Plan Design

Unanchored precast concrete barriers in Rhode Island should include the following:

  • Two 2” lifting holes set 1’-6” from each end of each panel

  • A 3” open joint between each panel

  • Each panel should be 2’-0” wide and 10’-0” long

Rhode Island Concrete Barrier Section A-A

From an end view, section A-A panels should conform to the following:

  • Height: 2”-9”

  • Bottom width: 2’-0”

  • Top width: 6”

  • Bottom slope starts 4” from ground line

  • Height of the bottom slope: 10”

  • Height of the top slope: 1’-7”

  • Break point: 14” from the pavement or ground line

  • Vertical reveal: 4”

  • Symmetrical in nature

Rhode Island Concrete Barrier Section B-B

From an end view, section B-B panels should conform to the following:

  • Distance between R-1 and R-2: 1’-9”

  • ½” chamfer (TYP. Both ends)

  • 1” shear pin at the top

  • Symmetrical in nature

Rhode Island Concrete Barrier Section C-C

From an end view, section C-C panels should conform to the following:

  • Distance between R-1 and R-2: 1’-9”

  • Distance between R-1 and the top of the panel: 7”

  • ½” chamfer (TYP. Both ends)

  • 1” shear pin at the top

  • Symmetrical in nature

Rhode Island Concrete Barrier Elevation Detail

From a side view, Rhode Island unanchored precast concrete barriers should conform to the following dimensions:

  • Length: 10’-0”

  • Height: 2”-4”

  • Bar R-1 and #5 Bar R-2 should be inserted through the panel on an incline

  • Distance between #5 Bar R-1 and the top of the panel on the left: 5”

  • Distance between #5 Bar R-1 and the top of the panel on the right: 7”

  • Distance between #5 Bar R-1 and #5 Bar R-2: 1’-9”

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