road drainage steel grating

  1. Steel product standard: China YB/700-88
2. Features: it is manufactured according to customers' requirements
For example:
1) Bearing bar pitches may be 12.5,15 to 30, 40, 60, 80 and 90mm, of which 30 and
40mm are recommended
2) Cross bar pitch may be 30, 38, 50, 76 and 100mm, of which 50 and 100mm are
recommended
3) Advantages of steel gird plank: light weight, strong intensity, big load capacity,
transmission and aeration, antiskid and secure, wear well, non-dropsy, non-dirt,
and easy to install
4) Hot galvanizing standard: China GB/T13912-92
5) Wrapping: wrapping is requested by guests or it depends on the wrapping
methods used before    

Load bearing flat bar size	thickness>= 3mm;    depth>=19mm
	25*5*3  32*5*3  38*5*3  44*5*3  50*7*4  55*7*4  60*7*4  65*7*4  75*7*4  90*7*4  100*7*4 19*13 19*5 20*3 20*5 25*3 25*4 25*4.7 25*5...40*6 40*8 40*10 90*6
Pitch of Load bearing flat bars (mm)	12.5 15 20 30 30.6 32.5 34 34.8 35.3 40 60 80
Pitch of cross flat bars (mm)	38.1 50 50.8 70 75 80 99 100 101.6 102 .....