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A- Grate Dimension B-Grate Thickness C-Clear Opening E-Base Flange F-Frame Height Grate Type Square Feet Open Weir Perimeter Lineal Feet
22-1/2 x 22-1/2 2 20-3/4 x 20-3/4 32-3/4 x 35-1/4 9 to 10 V 5.6
All dimensions are listed in inches unless otherwise noted.

Illinois DOT Type 21

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