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Modifying Grate Elevation on an Existing, Atypical, Structure

Modifying Grate Elevation on an Existing, Atypical, Structure

Modifying Grate Elevation on an Existing, Atypical, Structure

(OP)
I am working with a municipality to improve an intersection and a drainage issue at the intersection. At the intersection is an inlet with a frame and grate. However the structure is a large concrete box, almost like a septic tank, instead of a typical manhole structure. The frame and grate is inset into the top of the box and the top is exposed. I may be looking at raising the grate elevation a bit and back-filling the intersection shoulder around the inlet. I was wondering what might be the best way to go about that. I was thinking of maybe using a round-to-square adapter to place on top of the existing box but I don't know the best way to attach it to the box. I may be totally off with my idea so I appreciate any assistance.

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

most inlets I have seen are square, not round. why change?

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

(OP)
I'm not changing the size or shape; but I might have to adjust the elevation. I wish I could figure out how to attach a picture. It is like having a frame and grate embedded into the top lid of a septic tank. Thinking out loud here, maybe a way to adjust the grate elevation is to set rebar into the top of the structure and hand form a concrete riser for the grate to sit in.

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

Why remove grate build up with concrete and reset the grate to grade?

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

You may be able to find square adjustment rings that would work too, like those used for adjusting manholes and catch basins to finished grade. If the grate is a standard size this is more likely.

#

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

Any reason you can't just use bricks?

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com

RE: Modifying Grate Elevation on an Existing, Atypical, Structure

(OP)
Yep, bricks came to mind a while after I posted this. Thanks for all of your responses.

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