Dimensions of Portable Concrete Barriers

Jersey Barrier

• Jersey barriers, also called New Jersey concrete safety shape barriers, are the most commonly used portable concrete barriers, according to the Federal Highway Administration. The Jersey barrier stops vehicles in two ways. In low-impact crashes the slight ascent as the barrier base lifts tires off the pavement, breaking traction and stopping the car. At higher speeds, the bumper hits the slightly slopped, vertical concrete face, is lifted off the pavement and stopped.

Dimensions

• A 3-inch concrete lip at the base of the barrier meets a 10-inch slope at 55 degrees. From there, the slope meets a slightly angled 19-inch vertical face. The slight angle is at 84 degrees. The overall height is 32 inches. The barriers are 24 inches wide. Manufacturers offer varying lengths, generally in 10-, 12- and 20- foot sections.

F-Shape Barrier

• F-shape portable concrete barriers are the result of a study to improve the safety of temporary barriers, according to the Federal Highway Administration. The F-shape was a success as it reduced the tendency of vehicles to yaw or roll upon contact. Vehicles are directed up and over the barrier, where they slide along the top until coming to a stop.

Dimensions

• The initial, 3-inch rise of the F-shape barrier meets a 55 degree angled, 7-inch rise. The rise meets a slightly angled, vertical face that is 22 inches tall. The slight angle is 84 degrees. Its overall height is 32 inches and the width is 24 inches. F-shape barriers are manufactured in varying lengths, generally in 10-, 12- and 20-foot sections.