The same is the use of corrugated Guardrail, Highway Guardrail, the price is generally 120-160 yuan/meters, and the rural road guardrail, the price is about 70-100 yuan/meters. The reason for this price difference is:
1. materials. According to the Industry Standard Rules issued by the Ministry of Communications, the thickness of guardrails on highway should not be less than 4.0 mm, while those on rural roads are generally 3.0 mm or even 2.5 mm.
2. Specification, the specification of highway guardrail is higher than the requirement of rural guardrail. Highway Guardrail Plate Thick, post is also high, the use of connectors is a better anti-block energy absorption; Rural Road Guardrail Plate Thin, column is also low, the use of connectors brackets, energy-absorbing effect in general.
3. anti-collision level, on the highway driving cars, the speed is very fast, therefore, the required anti-collision level is also very high. Expressway traffic flow, speed is also fast, more use a class materials, rural road traffic flow is small, slower use B class or C class in the majority.
4. surface treatment, zinc or zinc plating alone + spray. Surface anti-corrosion treatment is divided into national standard and non-standard, relatively speaking, the materials used in the highway are all of the national standard level, zinc coating thickness of 600g per square meter, 270g/m2 + 76m/m2 coating coating coating coating coating; In rural areas, the undulating guardrail with thin galvanized layer is usually used, some galvanized amount is 300g/m2, some even less than 100g/m2, and the undulating guardrail of rural road is also thin, generally about 46m/m2. In the normal use of outdoor conditions, just need to do a regular routine maintenance, corrugated guardrail service life can reach 15-30 years.
