The Hawaii Department of Transportation Highways Division (HDOT) utilizes several types of concrete barriers. For permanent installations, HDOT typically calls for slip formed, cast-in-place, concrete barriers that do not require connecting or stabilization pins. However, HDOT also utilizes Portable Concrete Barriers which do require connecting and stabilization pins. Both types of pins are made from ASTM A36 steel, and, per Hawaii Standard Specification Section 718.01, shall be galvanized.

Connecting Pin

The Hawaii connecting pin for portable concrete barrier is a 1-1/4″ x 26″ long ASTM A36 rod with a 3/8″ x 3″ round washer fillet welded to the top end of the rod. Per Note 4 on Standard Plan TE-43, a one piece headed pin with a 3″ rounded top may be used in place of the welded washer design. Per Hawaii Standard Specification Section 718.01 the connecting pins must be galvanized. The connecting pin design and notes can be found on Hawaii Standard Plans TE-42 and TE-43 which may be purchased from the State of Hawaii’s website here.

Stabilization Pin

The Hawaii stabilization pin for portable concrete barriers is a 1″ x 40″ long ASTM A36 rod with a 3/8″ x 2″ round washer fillet welded to the top end of the rod. Just like the connecting pin, a one piece headed pin is an acceptable substitute as long as the pin head meets the minimum dimensions of the welded washer design. Per Hawaii Standard Specification Section 718.01 the stabilization pins must begalvanized. The stabilization pin details can be found on Hawaii Standard Plans TE-42 and TE-43 which may be purchased from the State of Hawaii’s website here.