Our 12x12 Catch Basin Riser will raise your 12x12 basin coverage 4 inches. Still fitting all of our 12x12 Catch basin gratings as well. Has a 4" channel knockout on all four sides as well.
Installation is simple... you just attach right on top of your basin, and any of our 12x12 gratings will fit nice and snug on the riser...
Wish we had more information that that... but its really that easy!
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With a cast iron grate, will this riser support a class C vehicle?
Yes, if/when surrounded by asphalt or concrete - it will hold the C class rating still. Thank you