Generally, pressure welded steel bar gratings are divided into three series by bearing bar specing:

When bearing bar specing is 30mm:

This size of steel bar gratings is the most common type used in different kinds of industrial fields. Bearing bar specing is 30mm, which meet American standard. It is the most resistant to surface impact. It has a wide range of uses for power plants, refineries, sewage treatment plants, granaries, chemical plants, highways, airports, terminals and other platforms,walkway,drainage cover,stair tread etc.

Serrated steel bar gratings can be used in moist and creamy place, especially for offshore oil production platforms.

When bearing bar specing is 40mm:

This size of steel bar gratings is the most economical type,which meets specification of British standard for fixed platforms, walkways and stair tread. This would be the most ideal product under occasions in small span. That is no exception to the load of transportation equipment walkway. It can be also used as warehouse shelves, pavilions panel, trestle, protective fence, sunshade screens and so on.

When bearing bar specing is 60mm:

This size is especially designed and manufactured for mining industries, solving the problem which mineral spills on the board. Common opening size is 50x60mm for this series of steel bar gratings. It allows most splashing mineral to pass through,ensuring board clean and safe. This grating is often used in the board of crushing systems, as well as in conveyor lines, ball mills, processing plants and operating stations.