The Arizona Department of Transportation (ADOT) utilizes several types of concrete barriers. For permanent installations ADOT typically uses slip formed, cast-in-place concrete barriers that do not require connecting or base pins. However, for temporary precast concrete barrier ADOT does require barrier connecting and anchoring pins. Both types of pins are required to be high strength ASTM A449 steel and galvanized per ASTM A153.
Connecting Pin – PB Part #18357
The Arizona barrier connecting pin can be manufactured in one of two ways. The first option is a galvanized high-strength ASTM A449 rod with thread on the top and a circular washer fillet welded to the rod. The second option is to use a one piece, forged head in place of the welded washer design. The purpose of the round washer/forged head is to rest on the top connecting loop on the barrier and keep the pin in place. The purpose of the threads is to ease removal using a special lifting nut that is screwed onto the pin.
The forged head alternate may feature a horizontal hole or 2nd lip on the head for easy removal. An optional 3/16″ bevel may be added to the bottom of either style for ease of placement. Both styles can be seen on Standard Drawing C-3, Sheet 2.
Anchor Pin – PB Part #18485
ADOT specifies a basic unthreaded rod for securing barriers to the ground. Like the barrier connecting pins, the anchor pins are galvanized high-strength ASTM A449 steel.
These anchor rods are typically installed at an angle, but specifics of installation and number of anchor rods required per barrier section may vary depending on the project. An optional 3/16″ bevel may be added to the end of the rod to facilitate driving the anchor pins into the ground or asphalt. Anchor pins are also shown on Standard Drawing C-3, Sheet 2.