The main structural features: the number of section steel trusses and truss ends to form the main structure of the guardrail, steel truss hinge connection between the longitudinal beams of steel pipe wear applied prestressing strand. Each group truss two casing and connected by steel columns with embedded casing is provided with caster truss truss is provided with a bracket for mounting the anti-glare board. This innovative form of fence to change the the previous the widespread impact resistance of the various activities fence weaknesses. Truss structure, prestressing strand beam pipe wear, truss connected through the column and embedded casing, triple protection guardrail crash ability to meet the requirements of Am-level containment level. The dedicated hinge connection between the truss, set at the bottom of the truss height-adjustable caster, to ensure the flexibility of the activities fence can be more convenient to open the activities fence. Also better able to adjust the linear activities fence. All components are used to open security processing, to avoid theft and at will. Step 1 is opened, the open ends of the protective tube and the loose ends of the fastening nut. 2, open anti-theft bolts in the crash on the column and pull the bull column (Step 1 simultaneously). 3, open on one side connected to the bottom of the hinge pin lever bolt and pull the corresponding location of the pin. 4, rotating, folding or moving activities fence to the appropriate location Close steps: 1, rotation, back to the guardrail installation location. Inserted at the connecting hinge pin lever up and fixed pin rod bolts at the bottom. 3 Insert the end of the bull column in the standard segment and fixed anti-theft bolts. 4, the head of the fastening nut of the fastening end and mounted on the protective tube. Tel 18101593181