Galvanized steel grating trench cover after cover is produced, performed corrosion preventive treatment. There are two kinds of hot-dip galvanized and electro-galvanized points. HDG trench cover because of its appearance, many kinds of specifications, impact force, better corrosion resistance and a higher price and are widely used. According to the manufacturing process, into pressure welding galvanized galvanized trench cover and press the lock groove decking; trench cover by galvanized flat steel surface shape, tooth galvanized into trench cover, trench cover flat galvanized , L-type galvanized trench cover and composite trench cover. Galvanized trench cover Form Factor: galvanized trench cover appearance described as square, round, trapezoid, pies, polygons and other shapes, usually about two meters in width, needed more than two meters thick. Galvanized trench cover Features: The field frequency simple construction, light weight, carrying, impact, rather bend do not break, displacement of large, hot-dip galvanized beautiful and durable, corrosion, has the advantages of cast iron cover insurmountable. . Grating dog usually changed by a fixed frame and activities consisting of steel grating trench cover, it can be coupled with tightening fittings as required and anti-theft devices, may also hinge connection or connection using hooks, etc., easy to open, and the burglar function. Galvanized trench cover uses: galvanized trench cover widely used in urban roads, squares, gardens facilities, marina, residential areas, schools, coal and other different places ditch, tree pools. Galvanized trench cover style classification: 1, GT-type trench cover: steel grating trench cover the roadway into the side ditch ditch lid cover and transverse directions according to dealers. Carrying flat and parallel to the direction of vehicle travel is called transverse ditch cover. GT-type trench cover applies in addition to the road where the road is generally a little traffic. Gully cover for use as a cross-sectional, the need to take into account the risk of the cover jump should be used bolt-ditch cover. 2, GM-type trench cover: Road Park and other municipal facilities, water wells, manholes sink under water wells, water wells and other water supply and drainage control wells, holes, manhole cover, can be used GM-type wells steel grating cover , GM-type well control steel grating can be designed to open and close the cover general can flip angle of 110 degrees. Steel grating with a rudder angle of the only security but also simplifies the process. In order to improve impact resistance, GM-type trench cover commonly used bar spacing of 50mm steel grating fabrication. Galvanized trench cover size selection: 1, flat direction bearing (support) direction, according to ditch (wells) wide gaps remain flat fixed length L; 2, according to the ditch (well) long layout, taking in line with processing modulus The standard plate width 995mm, leaving a gap between the plates 5mm; 3, ditch (well) remaining less than one meter long section modulus given by size; 4, according to the channel (well) and carries a wide selection of steel grating model requirements. Load Selection: Pressure: Light: 25 t / m2 heavy: 70 t / m2 super-heavy: 140 t / m2 Application: light car, pedestrians campus, residential garden, park, underground parking, kitchen and so on. Heavy: 20 tons of plant automobile traffic, general highway, the main road side of the road, parking and streets. Super Heavy: Heavy trailers, container cranes and fork aircraft traffic trunk road, large parking lot, mines, docks and airports and so on. I designed according to user requirements of various sizes or trench cover with additional functions.