What is the general column spacing of highway guardrail network?

The installation height of the fence is also an aspect related to the safety of use; The height of the column of the highway guardrail network basically determines the installation height of the isolation facility, this index is an important parameter in the design of the guardrail network, and its value height directly affects the cost and use effect. The main factors to consider when choosing the height of the fence are the density of people and the terrain along the line. The specifications of the cold-formed equilateral channel steel are provided with 6 alternative forms, which can be selected under different stress conditions, and other suitable section shapes of steel can also be used under the conditions of strength and stability.

From the main force direction of the channel column, the selection of specifications should make the main inertia (Iy) of the core around the y-y axis larger channel steel. The effective height specified in the national JTJ074-94 guardrail standard is between 1.6 and 1.8m, and the provisions of this value range mainly consider the adult height, in order to prevent overturning as the main design goal. It has been observed that if people want to enter the highway, they generally destroy the highway guardrail, and the damage position is below 1.2m. Although a higher guardrail can better prevent people from crossing, it can not prevent people from entering the highway, and what can really regulate people's behavior is the legal awareness and the degree of civilization of society.

With the development of society and the improvement of people's legal awareness, the number of people violating traffic laws is bound to decline. In developed countries such as the United Kingdom, the design height of the double-ring guardrail network is also about 1.3 meters. Therefore, the guardrail net should not be set too high, it is recommended that the exposed height of the guardrail net in the general area is 1.2m-1.5m, and the special area is 1.6m. This height is not easy to climb and saves investment.

How much is the spacing set for the highway guardrail column? Due to the lower height of the guardrail column, it is recommended that the column spacing should be set by 5m from 4m, so 201 pieces per kilometer; If set at 4 meters, 251 per kilometer, that is, 50 columns per kilometer are saved. Net and nemator in the rural area near the village people around its frequent activities, the net should be used metal net or steel plate net. So this type of network is not harmful to people. The design should use the lower dense (0~60cm high) 10×15cm hole and the upper sparse (60~120cm high) isolation net 20×30cm hole, so as to save materials and save costs.