The Oregon Department of Transportation (ODOT) utilizes two different styles ofgalvanized ASTM A449 barrier pins for standard concrete barrier connections, as well as modified versions of the connection pin for 42″ tall (Federal) barriers. ODOT also has a specification for anchoring the barriers in place.
Standard Connecting Pin – PB Part #18241
The standard Oregon barrier pin is a galvanized high-strength ASTM A449 rod with thread on the top and a circular washerfillet welded to the rod. Alternately, a one piece, forged head may be used in place of the welded washer design.
The purpose of the round washer/forged head is to rest on the top most barrier connecting loop and keep the pin in place. The purpose of the threads is ease of removal using a special lifting nut that is screwed onto the pin and used to lift it out.
The forged head alternate may feature a horizontal hole or 2nd lip on the head for easy removal. An optional 1/2″ bevel may be added to the bottom of either style for ease of placement. Both styles can be seen on Standard Drawing RD500.
42″ Tall Barrier Connecting Pin – PB Part #18344
Oregon also utilizes a high-strength ASTM A449 galvanized heavy hex head bolt with threads on the bottom portion for connecting 42″ tall precast concrete barriers. These are sometimes referred to as “tall barriers” or “Federal barriers.”
This style of barrier connecting pin features a beveled end to facilitate installation through the barrier connecting loops. The bolt is slid through the connecting loops of two adjoining barriers and then a nut (typically a square nut) is assembled on the threads to keep the bolt from being removed. SeeStandard Drawing RD545.
Anchor Pin – PB Part #18485
These anchor rods may be installed horizontally or at an angle, depending on the type of barrier, type of surface, and the application. An optional 1/2″ bevel may be added to the end of the rod to facilitate driving it into the ground or asphalt. See the Standard Drawings – RD515 and RD516.