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Rail cast iron support frame ( cast iron support frame ) is also called bridge cast iron support, highway guardrail, cast iron guardrail bracket, guardrail stand, cast iron stand, guardrail bracket, cast iron pipe rack for highway guardrail, rail bracket rail bracket. Cast iron support technology: sand mold forming - casting - semi - finished molding - sand blasting processing - spray - painting - finished product special point: less production link, easy control of production process, large batch production. The highway guardrail is divided into the Lu guardrail and the central divider guardrail according to the setting position. The roadside guardrail is the guard rail which is set on the shoulder of the highway. The purpose is to prevent out of control vehicles out of the way out, and to avoid collision of other roadside facilities and vehicles out of the road. The central divider guardrail is the guardrail arranged in the central divider of the highway. The purpose is to prevent runaway vehicles from crossing the central divider into the direction of the roadway and to protect the structures within the compartments. The guardrail can be divided into rigid guardrail, semi - rigid guardrail and flexible guardrail according to its mechanical properties. Anti - collision guardrail, as a necessary facility for highway, has certain influence on high speed driving safety, driving comfort, highway landscape and engineering cost. therefore, in the construction of highway, various characteristics of collision avoidance must be fully understood, including its collision avoidance mechanism, engineering cost, construction simplicity, maintenance cost, anti - glare device setting and communication pipeline configuration. 
The bridge guardrail support is to close the sides of the line, not to allow people and livestock and non-motor vehicles to break into the road isolation facilities, it has the absorption of collision energy, forcing out of control vehicles to change direction and to return to the original direction of travel, to prevent the more out - way out or fall under the role of the bridge. For large bridges, bridges and bridges on highways, grade 1 highways and other high-grade highways, bridge guardrail shall be provided without conditions, and bridge guardrail shall be provided for the large, large and medium bridge of the general highway.