China's domestic fence products are: highway fence, rail fence, bridge fence:, sports fence, fence which is divided into: double ring fence, bilateral wire fence, frame-type fence, wave-type fence network, airport fence area, triangular bending wire mesh fence, barbed wire barbed wire fence, of which the highway fence, rail fence based. Fence is also called safety net, fence. Temporary Fence site planning large-scale celebrations, a major exhibition conferences, major sporting events and temporary activities, road isolation, channel management, route guidance. 10 of the median openings ① highway guardrail activities must set the active barrier. ② has a median in the middle of a road vehicle ban U-turn median openings should set the active barrier. ③ activities should be set up in the center median guardrail opening road centerline position, length is set to be able to effectively closed central median openings. ④ activities set the height of the fence should be coordinated with the central median guardrail height. Events fence should be set the standard profile or the upper reflector. When setting up reflectors, specifications for 4cm x 18cm, reflective film or reflective film may be produced, reflective rating should be more than two, color, and set the height of the central median should outline standard consistent. ⑤ located in antiglare facilities should be set up glare requirements on the activities of the fence sections. Heavy-duty fence, conventional guardrail, traffic guardrail www.czzyjtss.com