1064.1 Scope. This specification covers temporary traffic barrier for use in highway construction.
1064.2 Type F Temporary Concrete Barrier.
1064.2.1 Acceptance.
1064.2.1 1 Three-Loop Concrete Barrier. The manufacturer shall provide certification to the contractor that
the barrier is in accordance with the contract documents.
1064.2.1 2 Two-Loop Concrete Barrier. Use of two-loop temporary Type F concrete barrier shall not be
allowed after January 1, 2023.
1064.2.2 Material.
1064.2.2 1 All material, in the manufacturing of three-loop type F temporary concrete barrier, shall be in
accordance with the following specifications: Item Specification Reinforcing Steel for ConcreteAASHTO M 31, Grade 60 Connection Rod A36 Steel Anchor Bolts ASTM A307 Connection Rod Assembly AASHTO M 183 Retainer Bolt and Nut SAE Grade 8 Asphalt Pin A36 Steel Thrie Beam Nested 12 Gage or 10 Gage Thrie Beam Bolts ASTM A307
1064.2.2 1.1 All reinforcing steel shall be deformed bar. Loop steel shall be 0.75-inch smooth steel bars with a
minimum yield of 60 ksi, shall have a tensile strength of no less than 1.25 times the yield strength, but a minimum of 80 ksi, a minimum 14 percent elongation in 8 inches, and passing a 180-degree bend test using a 3.5 times diameter pin bend diameter. The loops shall be installed within 0.125 inch of the plan dimensions.
1064.2.2 1.2 The manufacturer shall retain, at a minimum, all compressive strength test results, entrained air
content records, and reinforcing steel certification for at least five years.
1064.2.3 Manufacture.
1064.2.3 1 Welding of loop steel shall be limited to the minimum surface welding necessary to maintain the
position required for placement.
1064.2.3 2 Visual cracks in the loop steel will be cause for rejection.
1064.2.3 3 Concrete shall be air-entrained with 28-day compressive strength of 5,000 psi. Concrete shall be
continuously cured until 5,000 psi is attained. Fine and coarse aggregate shall be in accordance with Sec 1005, except that gradation requirements and percent passing the No. 200 sieve will not apply. Temporary concrete traffic barrier shall be manufactured in accordance with industry standard practices for pre-cast construction.
1064.2.3 4 All temporary concrete traffic barrier units shall be permanently marked with the name and location
of the manufacturer, and the month and year of manufacture in a location visible after installation. Paint or other liquid marking will not be permitted.
1064.2.3 5 The surface of temporary concrete traffic barrier shall be smooth and non-deformed and substantially
free of honeycomb, surface spalls and surface defects. Barrier units shall be straight and square on the ends and shall meet the following tolerances: DimensionTolerance Length + 3/4 inch Width + 1/4 inch Height + 1/4 inch
1064.3 Alternative Temporary Traffic Barrier.
1064.3.1 Approval. Prior to approval and use, the contractor shall submit to MoDOT, the manufacturer’s name,
the product brand name or model number, a copy of the MASH 2016 or NCHRP 350 test results, shop drawings and any other information requested by the engineer.
1064.3.2 Acceptance. Acceptance of the material will be based on the manufacturer’s certification and upon
satisfactory field performance.
Temporary Traffic Barrier in other states
Get an email when 1064 changes
Missouri revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.