Because the inner and outer stainless steel rails are metal, so its compressive strength, impact resistance, tensile strength, elongation, high elastic modulus, thermal expansion coefficient of zinc alloy fence, with good mechanical properties spraying Community fence, very suitable for building water supply riser and underground laying. Stainless steel composite pipe is the inner stainless steel tube set into the hot dip galvanized steel inside the fence, in the role of mechanical forces, so do necking treated galvanized steel inner tube made of stainless steel expanding treatment, the two materials closely, its bonding strength than the national standard 1mpa more. Because the inner and outer layer of zinc alloy material similar to highway guardrail, so no splitting. Many partition type bridge parapet, there are divided according to the position, there is division in accordance with in accordance with the anti-collision performance division. So what specifically they divide these types of purpose and effect is it, here we come to know the next: according to the location of the fence has divided side of the bridge parapet, the central median guardrail and pedestrian bridges, lane boundary fence. According to the division structure is divided into the guardrail guardrail beams, reinforced concrete wall bar and modular expansion fence. According to the type of crash performance rigid barrier fence, guardrail and flexible barrier. So we need to choose the fence when the construction of local roads, bridges grade security to considering options. Finally, according to the structure itself, as well as economic factors such as construction and maintenance and repair constructed in the form of options. Zinc alloy fences, longtai metal fence by Linqu longtai Huainan metallwarenfabrik. Linqu longtai Metal Products (www.wfhulan.com) Shandong Weifang, fence, fence, network leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In longtai metal leadership with the staff warmly welcome all inquiries negotiations to create a better future longtai metal.