In addition to strict requirements on specifications, models and other aspects, the number of the guardrail boards should also be used with caution. The amount of guardrail used in expressway is usually stipulated. The spacing of standard sections is 4 meters. 250 plates, 250 columns, 2 ends, 250 caps, 250 anti-blocking blocks, 250 sets of connecting bolts M16*170/42 and 2000 sets of splicing bolts M16*35 are used for each kilometer.
In addition, besides various specifications and models, waveform guardrail also has many kinds of classification. Wave beam guardrails are generally classified according to location and collision level. According to the location, it can be divided into roadside guardrails, central corrugated guardrails and partition guardrails; according to the anti-collision grade, it can be divided into A level and S level. S-level guardrails belong to the reinforced type, which are suitable for the use of special dangerous sections on both sides of the road. A-level guardrails are used for special highways. The commonly used roadside corrugated girder guardrails can be divided into five levels---B, A, SB, SA and SS according to the anti-collision grade
Among them, two wave beam guardrail and three wave beam guardrail
are common. The common specifications of two wave beam guardrail are 4320 mm x 310 mm x 85mm x 3/4 mm, the column is 114/140 mm x 4.5 mm, and the common specifications of three wave beam guardrail are 4320 mm x 506 mm x 85mm x 3/4 mm.
Each product is not single and rigid, such as waveform guardrail. According to the specific situation, there are different production standards, different specifications and models, producing a variety of products to meet the needs of customers.