Zinc steel fence is a steel highway guardrail, fence structure is the original column is divided into two parts, the upper end of the inner steel pipe on the lower end of the column set next column, bolt across which is connected to the upper and lower steel column together. It does this by strengthening the next column, or other processes that use the casing to prevent deformation of the lower part of the fence post, while the upper part of the column partial weakening or all of the weakened position to control the deformation of the fence post, so although the arm is reduced, but the cross-section flexural modulus also decreases, thus ensuring the crash rating not less than the original standard design. The fence construction is easy, can be easily replaced after vehicle collision, and applies not only to soil shoulder, retaining walls and bridges and other locations, but also applies to all forms of steel fence. This product has a beautiful and durable, no deformation, quick installation, is an ideal metal fence products. Use: Mainly used for park / zoo fence, campus / field area around the boundary, road traffic isolation, isolation fence with temporary plug