... in the construction. Steel grating1> Bearing bar pitches may be 15 to 22, 25, 30, 32.5, 34, 40 ... capacity: the range PH6 to PH12.5, a stable protective film will be formed on the zinc surface ... method is suitable for those parts which will be fixed forever, such as platforms for equipments, ... by installation fastener has the properties of easy to assemble and disassemble and of preventing destroying ...