2>cross bar pitches:maybe 24-200mm,of which 50mm,76mm and 100mm are recommended.

3>Steel grating is made by the world first-class equipment,which can arrange the bearing bar and cross bar in longitude and latitude order to certain distance.cross bar is pressed into the bearing bar by high tension resistance weldingring which is controlled by we can produce high quality gratings with firm welding,smooth surface and high strength.

4>Surface process of gratings: there are three types:hot-dipped galvanized ,electro-galvanized and spraying brushing and soaking.anti-acid and alkali corrosion capacity the range PH6 to PH12.5,a stable protective film will be formed on the zinc surface.it has good anti-corrosive property.

2.Specification of hot dip galvanized steel grating

1.The grating that the pitch between bearing bars is 30mm,is most widelyused type in

industrial field. Among normal types,it has the strongest resistance to surface lash.

2. The grating that the pitch between bearing bars is 40mm is the most economical and

lightest type. It is the best choice for you on occasions that the clear apan is small.

3.The grating that the pitch between bearing bar is60mm and the pitch between cross is 50mm

 is developed specially for mining industry .It solves the problem of mineral splash on the plate . So it is often appointedto use in processing works, of mining industry .

4.The grating with the pitch of 30mm  between bearing bars and of 76mm between cross bars is the most popular type used home and abroad. It is proper for many applications such as walkways, platforms,etc.