How many levels are there in the crash barrier?

There are two grades: Grade A and Grade S. The Grade S guardrail is reinforced and suitable for particularly dangerous road sections, and the Grade A guardrail is used for special roads. Common roadside corrugated beam guardrail can be divided into five grades according to the anti-collision grade: B, A, SB, SA and SS.

The standard section of corrugated guardrail plate has a column spacing of 4 meters per kilometer, including 250 plates, 250 columns, 2 ends, 250 column caps, 250 anti-blocking blocks, 250 sets of connecting bolts and 2000 sets of splicing bolts.

Anti-collision guardrail is a typical cold-formed steel product, which has the advantages of good impact resistance, low cost, long life, high safety and environmental protection. Guardrail width is 3 10mm, thickness is 3mm and 4 mm, paving 1 ton guardrail board: 80m and 3mm thick, and 6 1 meter and 4mm thick. The weight per kilometer of 3mm thickness is 12.3 tons, and the weight per kilometer of 4mm thickness is 16.388 tons.

Extended data:

Shortcomings of anti-collision guardrail on expressway

1. The base material of the crash barrier is galvanized steel of various specifications made of hot-dip galvanized steel strip. High frequency welding technology is adopted, and the welding is smooth and firm.

2. The zinc content on the galvanized pipe surface of the crash barrier reaches 60-80mm/㎡, and it will not rust for 3-5 years at room temperature.

3. The product feature of the anti-collision guardrail is no welding, and the fittings developed by zinc steel are combined with pipes, which are beautiful, firm and applicable, and meet the standards of American guardrail association.

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