... 30mm steel plate)is the most common type, use in all industrial areas, this series of products ... Serrated Style Steel Grating and I Bar Type Steel Grating.We can design and manufacture standard ... ) Specifications(mm):The specification of plain type and serrated type bearing bar is 20x3 to 100x10 , ... the specification of I –section type is 25x5x3, 32x5x3,38x5x3,40x5x3,50x5x3,50x7x4,55x7x4, ...