Steel Grating Ltd drainage grates and sump covers have a large amount of open area to allow liquid to drain easily while still providing strength and economy to support heavy loads.  We recommend series 1 grating for drainage grate and sump covers for maximum strength.  We have categorised our grating into the 5 most common vehicle usages.  Please refer to the table below that states what each of our grating types will clear span for the different vehicle types.

LOAD DATA BASED ON THE FOLLOWING CRITERIA

• Vehicles assumed to be fully laden
• Spans shown in the table are clear spans
• Assumed minimum support width = to load bar depth
• Impact factor of 1.3 for moving vehicle applied
• All vehicles travelling parallel to span of grating
• The span of the grating must not be greater than the wheelbase of the vehicle

Steel Grating can also supply MSA trench grate frames if required. Please contact Steel Grating Ltd for more information on these.