Expansion wave beam column is the main form of semi-rigid guardrail, it is a kind of corrugated steel fence panels spliced ??to each other by a continuous structure of the main pillar supporting. It uses the soil base, column, beam deformation to absorb impact energy and force out of control of the vehicle changes direction and returns to the normal direction of travel of the vehicle out of the road to prevent the outside to protect the vehicle and passengers, to reduce the loss caused by the accident. Steel beam guardrail soft phase and, with a strong ability to absorb collision energy, with better sight inducing function, can be coordinated with the road alignment, appearance, can be used on a small radius corners, damaged at easily replaced. You can use a combination of beam guardrail on a narrow median strip. The way out to the vehicle (bridge), the segments may cause serious consequences, you can choose to strengthen the beam guardrail. Guardrail guardrail utility model relates to a highway median strip opening with a combination of movable type wave plate steel fence, the fence by fence between two sheets of corrugated steel plate and put the two retaining clips constituted two columns, two Column fixed interposed between two sheets of corrugated steel fence panels. During normal operation of the road, the fence can easily use plug column preset plug into the opening hole, played the role of isolation and protection while outside on the road with barrier tape echoes, uniform, beautiful package. When their vehicle collisions, due to the corrugated steel fence boards have good crashworthiness and energy absorption effect, it is not easy to be crashed, while at the same vehicles and passengers play a very good protection. When the highway maintenance or other reasons need and pass, you can easily put the opening of each group pulled upright fence removed, opening up channels to facilitate vehicular traffic.