Beam guardrail general location and crash rating by setting classified. Km 3MM thick heavy 12.3 tons, 4MM thick heavy 16.388 tons. Second, the column: roughness specifications Q114, Q140MM length with generally 1.2 m, 1.4 m, 1.85 m, 2 m, 2.15 m, 2.27 m, thickness of 4MM / 4.5MM. Third, each with a 250 kilometer fence panels. Column spacing of 4 meters per kilometer by 250 vertical by setting location can be divided into a roadside fence and the central median barrier. Press crash rating generally be divided into A and B grades. Class A fence are enhanced for particularly dangerous sections of road side use, B grade for private roads. Waveform fence material: high quality steel embalmed. Waveform diagram of a fence, railing width 310MM thickness: 3MM, 4MM. 1 t fence panels can shop: 80 m thick 3MM, 4MM 61 m thick. Each waveform guardrail corrugated beam barrier wave beam expansion is the main form of semi-rigid bar fence, which is a corrugated steel fence panels to each other by a continuous mosaic structure of the main pillar of support. It uses the soil base, column, beam deformation to absorb impact energy and force out of control of the vehicle to change direction, to return to the normal direction of travel of the vehicle out of the road to prevent the outside, in order to protect the vehicle and passengers, to reduce the loss caused by the accident. Guardrail guardrail utility model involves a highway median strip opening with a combination of movable type corrugated plate steel fence, the fence between the two pieces of the corrugated steel fence panels and two retaining clips put two columns constituted two Fixed column interposed between two sheets of corrugated steel fence panels. During normal operation of the highway, the fence post can easily use plug into the opening pre-set plug hole, played the role of isolation and protection, while the road outside the fence with echoes, uniform, beautiful package. When their vehicle collision, due to the corrugated steel fence boards have good crashworthiness and energy absorption effect, it is not easy been destroyed, while at the same vehicles and passengers to play a very good protection. When a road maintenance or other reasons and pass required, you can easily put the opening of each group pulled fence post removed, opening up channels for easy passage of vehicles.