nel gratings used in structural marine works:
CONCRETE DITCH WITH GRATING COVER
LIGHT TYPE GRATING
HEAVY TYPE GRATING
GRATING COVER AND fram
SUMP COVER
GRATING COVER
fram A mm * mm
Cover C mm * mm
Full Opening W mm * mm
fram Height E mm * mm
Cover Depth F mm * mm
Remark
681 * 681
533 * 533
457 * 457
69
73
Heavy Duty