1>steel grating platform bearing bar pitches may be 15 to 20,25,30,33,35,38,40,50,60,80,90mm,of which 25,30,35 and 40mm are recommended .

2>steel grating platform cross bar pitches may be 24-200mm,of which 50mm,76mm and 100mm are recommended .

3>Shape of bearing bars:

F-Plain style

S-Serrated style

I-I-section style