What are Minnesota Temporary Portable Precast Concrete Barrier Type “F” Specifications?

The Minnesota Department of Transportation outlines specifications regarding the proper dimensions for temporary portable precast concrete barrier type “F,” including elevation views, plan views, end views, and more.
Minnesota Temporary Portable Precast Concrete Barrier General Notes

1. This barrier should be consistent with type SWC09, as defined in “A Guide to Standardized Highway Barrier Hardware.”

2. Barrier sections should not be permanently incorporated into construction or maintenance projects.

3. At no time should the barrier be lifted or moved by the use of the loop bars 6D1, 6D2 or 6D3.

Definitions are as follows:

1. Marked end: the marked end is the end of the barrier that has one loop bar at the top and two loop bars at the bottom. Each barrier should be permanently marked on this end with the following information:

a. Type 8337C

b. Name or trademark of manufacturer

c. Location of plant

d. Month and date manufactured

2. Lifting hole: 4-inch diameter, 11-gague steel round mechanical subbing sleeve. These holes are optional.

3. V notch is optional.

Minnesota Temporary Portable Precast Concrete Barrier Elevation View Specifications

Each F-barrier panel in Minnesota should conform to the following dimensions and include the following features:

• Length: 12’-6”

• Height: 2’-8”

• Two lifting slots; each slot 1’-0” long, 4-1/2” high; each slot beginning 4’-3” from each outside end of the panel

• Two lifting holes; the center of each hole should be located 2’-1-1/2” from each outside end of the panel, and 1’-0” from the bottom of the panel

• One anchor blockout located at the bottom center of the panel on both sides

• 3-3/8” plus or minus 1/8” measured from the face of the barrier to the outside edge of the loop bar

Minnesota Temporary Portable Precast Concrete Barrier Plan View Specifications

Each F-barrier panel in Minnesota should conform to the following dimensions:

• Width: 1’-10-1/2”

• Length: 12’-6”

• Distance between the end of the panel and the first set of lifting holes: 2’-0”

• Distance between the first set of lifting hole and the center set of lifting holes: 4’-3”

• Diameter of each lifting hole: 2”

• Distance between the long edge of the panel and the center of each lifting hole: 3”

Minnesota Temporary Portable Precast Concrete Barrier End View Specifications

From an end view, Minnesota panels should conform to the following:

• Height: 2”-8”

• Bottom width: 1’-10-1/2”

• Top width: 8”

• Height of the bottom slope: 7”

• Height of the top slope: 1’-10”

• Break point: 11” from the pavement or ground line

• Vertical reveal: 4”

• V notch length: 7”

• Symmetrical in nature

• ¾” chamfer typical

Minnesota Temporary Portable Precast Concrete Barrier Tables

Minnesota Temporary Portable Precast Concrete Barrier Loop Bar Specifications

Minnesota loop bars used for temporary portable precast concrete barrier type F should conform to the following:

• Length of each bar: 2’-10-1/2”

• Height of each bar: 1’-4”

• Diameter: 9”

• Width: 4-1/4”

• Hairpin curve diameter: 2-3/4”

• Order of bar assembly, from top to bottom: 6D3, 6D2, 6D1

Minnesota Temporary Portable Precast Concrete Barrier Vertical Stirrup Bar 4A1 Specifications

Minnesota vertical stirrup bars 4A1 used for temporary portable precast concrete barrier type F should conform to the following:

• Height: 2’-4-1/4”

• Bottom length: 1’-3”

• Upper interior curve diameter: 4-1/4”

• Lower interior curve diameter: 2-1/2”

• Lower exterior curve diameter: 2” minimum

Minnesota Temporary Portable Precast Concrete Barrier Bar 62A Specifications

Minnesota bars 62A used for temporary portable precast concrete barrier type F should conform to the following:
• Interior curve diameter: 6-1/2”
• Length: 1’-4-3/8”
• Height: 8”

Minnesota Temporary Portable Precast Concrete Barrier Top Plate, Retainer Bolt and Nut, and Connection Pin Details

Top Plates
Minnesota barrier top plates should conform to the following dimensions:

• Length: 4”

• Width: 2-1/2”

• Hole centered on the plate: 1-3/8” diameter

Retainer Bolts and Nuts
Minnesota barrier retainer bolts and nuts should include a ½” diameter x 10” long grade 8 hex bolt and nut, plus a connection pin.

Connection Pins
Minnesota barrier connection pins should conform to the following dimensions and include the following features:

• 5/8” diameter hole for retainer bolt at the bottom of the pin

• Pin made of 1-1/4” diameter ASTM A36 steel

• Top plate made of ASTM A36 steel that is ½” thick

• The pin should be 28” long

This blog post is an interpretation of specifications by the Minnesota Department of Transportation. Please consult with Minnesota's most recent requirements for definitive information.

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