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Construction/Municipal Castings
Inlet Frames and Grates
The table shown summarizes the various standard and special catch basin frames and grates currently available. These catalog numbers are sorted based on their C dimension. The Grate Type column indicates the standard grate style for the size you have chosen. Other grates types may also be available for the catalog number you have selected. For verification of alternate grate styles, check with your Neenah representative or our main office in Neenah, Wisconsin.

All catch basin castings are furnished with machined bearing surfaces, unless otherwise noted.

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CATCH BASIN FRAMES AND GRATES
STANDARD AND SPECIAL SIZES
Catalog
Number
Dimensions in inches
 Grate
Type 		Frame
Reference
A B C E F G
§ Not recommended for bicycle traffic. ‡ Light duty.
* Also available with Non-Rocking feature.       ‡ Only available with Non-Rocking feature.
R-2250 38 1-1/2 36 49 10 1 G R-2580-C
R-2251 36 1-1/2 34 45 8-1/2 1 x 15-1/2 G R-1752
R-2255 32 1-3/8 30 49 10 1-1/2 C,G R-1640-C
R-2270 32 1-1/2 30 46 7 1 x 6 C,G R-2580-A
R-2275 32 1-3/8 30 49 5-5/8 1 x 6 G R-1640-C1
R-2557 31-3/4 1-3/8 30 41 6-1/2 1 G R-1557
R-2558 31-3/4 1-3/8 30 41 8 1 G R-1558
R-2750 32 1-3/8 30 49 5-5/8 1/2 SPEC R-1750-C1
R-2290 29 1-3/8 27 46 10 3/4 x 5 SPEC R-1640-B
R-2290-A 29 1-3/8 27 46 5-5/8 3/4 x 5 SPEC R-1640-B1
R-2290-B 28-3/4 1-3/8 27 37-1/2 7 - SPEC R-1753-A
R-2293 27-1/2 1 26 34 4 7/8 G R-1773
R-2682 27-7/8 1-3/8 26 38-1/4 4-3/8 1 A R-1682
R-2296 25-3/4 7/8 24-1/8 35-1/2 7 1-1/8 B,C,F§, G R-2577
R-2297 25-3/4 7/8 24-1/8 35-1/2 8 1-1/8 B,F§ R-2577-A
R-2298 25-3/4 7/8 24-1/8 35-1/2 9 1-1/8 B R-2577-B
R-2299 25-3/4 7/8 24-1/8 35-1/2 10 1-1/8 B,C,F§ R-2577-C
R-2501 26 1-1/2 24-1/8 35-7/8 7 1 A,F§,G R-1642
R-2300 26 1-3/8 24 43 10 1 C,G R-1640-A
R-2370* 26 1-1/2 24 35-7/8 7 1 A,B,C, F,G R-2501
R-2371 25-3/4 1-1/2 24 35 7-1/2 - G R-1643
R-2390 25-3/4 7/8 24 30-1/2 7 1-1/8 C,G R-1590
R-2395-1 25-1/4 1-1/2 24 35-1/4 8 - G R-1769-A
R-2556 25-3/4 1-3/8 24 34-1/2 8 1-3/32 F§,G R-1556
R-2556-A 25-3/4 1-3/8 24 34-1/2 4 1-7/16 F§,G R-1556-A
R-2559 25-3/4 1-3/8 24 38-1/4 8 1-7/16 F§,G R-1559
R-2398 25-3/4 7/8 23-1/2 32 8 1-1/8 G R-2572
R-2401 26 1-7/8 23-1/2 35-3/4 8 1-1/8 G R-1723
R-2401-A 24-3/4 1 23-3/8 33-1/4 7 - G R-1777
R-2402 24-3/4 1 23 36 7-1/4 3/4 x 5-3/4 C,G R-1671
R-2404 25-5/8 2 23 38 10-1/2 1 x 3-3/4 G R-2650
R-2405* 25 1-1/2 23 38 9 1-1/4 A,C R-1760
R-2411-A 25-3/8 1-1/4 23 38-1/2 7 3/4 x 5-3/4 G R-1889
R-2412-A 23-3/4 1 23 31-1/4 4-5/8 1-3/8 G R-1787
R-2412-A1 24 1 22-3/4 36-3/4 9 - E§ R-1658
R-2553 24 1-3/8 22-1/2 31-1/4 3 1-3/32 G R-1553
R-2554 24 1-3/8 22-1/2 34 7 1-3/32 G R-1554
R-2412-A3 24 1 22-3/8 34 9 - E§ R-1657-1
R-2410* 24 1-1/2 22-1/4 24-31/32 7-15/32 2-1/4 SPEC R-2500
R-2412-A4 23-3/4 1-1/2 22-1/4 34 7 2-1/4 C R-2668
R-2412-A5 23-7/8 1-1/4 22-1/4 34-7/8 6 2-1/4 SPEC R-1648
R-2412-A6 23-7/8 1-1/4 22-1/4 34-7/8 8 - G R-1649
R-2418 23-3/4 1 22 38 9 1-3/8 G R-1771
R-2421-A 23-1/4 1-1/4 22 34 9 1 A R-1736
R-2422-A1 23-3/4 1 21-3/4 35 7 2-1/4 C R-1678-A
R-2555 24 1-3/8 21-3/4 34 8 1-3/32 G R-1555
R-2552 23-13/16 1-25/32 21-21/32 33-15/32 6-7/8 - SPEC R-1714
R-2420-B 22-1/2 1-1/4 21-1/2 29 6 1 x 9-1/4 G R-1776
R-2422-C 23-3/4 1 21-1/2 38 7 1-3/8 G§ R-2680
R-2423 23-3/4 1 21-1/2 38 9 1-3/8 C,G R-1785
R-2424-A 22-1/2 2-5/8 21-1/4 34-1/4 6-1/4 1-1/2 G R-1524-B
R-2437 22-3/4 1-3/4 21-1/4 36 4 1-1/4 D,E§ R-2595-A
R-2014* 22-3/4 1-3/4 21 36 9 1-1/2 C,D,E§ R-2504
R-2050* 23 1-1/2 21 36 9 1-1/4 C,D,E§, F§,G R-1550-A
R-2070* 23 1-1/2 21 36 9 1-1/4 B,D,E§, G R-2578
R-2427 22-3/4 1-3/4 21 36 5-1/2 - D R-1677-A
R-2427-A 23-5/8 1-1/4 21 37-1/2 7 - G R-1775
R-2428 23 1-1/2 21 36 9 1-1/2 C,D,F§ R-2578
R-2429 22-3/4 1-3/4 21 31-1/8 14-1/2 1 D,E§,G R-1672
R-2435 22-1/4 1 21 30 9-3/4 2 x 3-1/2 G R-1762
R-2437-B 22-1/4 1 21 28-1/2 4-3/4 2 x 3-1/2 G R-1762-A
R-2438 22-3/4 1-3/4 21 25-1/4 6 1 D,E§ R-1960
R-2502 22-3/4 1-3/4 21 36 7 1-1/2 C,D,E§ R-1772
R-2504 22-3/4 1-3/4 21 34 9 1-1/2 D,G R-1713
R-2030* 23 1-3/4 20-3/4 36 9 1 C,D R-1530
R-2080* 22-1/2 1-3/4 20-1/2 36 6 1-1/8 B,C,D R-2540
R-2112 22 1-1/2 20-1/2 28-1/4 6 1-1/4 A,C,G R-1761
R-2120 22 1-1/2 20-1/2 28 4 1-1/4 A,C,F§, G R-2510
R-2461-A 22 1-1/2 20-1/2 30 6 1-1/4 A,B,C, F R-1711-A
R-2464** 23 1-1/2 20-1/2 36 4 1-1/4 D R-1689
R-2540-A 22-1/2 1-3/4 20-1/2 38 6 1-1/8 C,D R-2540-A
R-2060* 22 1-1/2 20 36 6-1/2 1-1/4 A,B,C R-1700-A
R-2090* 22 1-1/2 20 35 9 1-1/4 A,B,C, E§,G R-2533
R-2100* 22 1-1/2 20 33 8 1-1/4 A,C,E§, F§,G R-1500
R-2110* 22 1-1/2 20 32 6 1-1/4 A,E§ R-1510-A
R-2466-A 22-1/4 1-1/2 20 32 8-3/4 1-1/2 B§,E§ R-1765
R-2471* 22-3/4 1-1/2 20 38 10 1 D,E§ R-1661
R-2471-B 22-1/2 1-1/2 20 34 9-1/2 1-1/8 D R-1707
R-2474 21-3/4 1-1/8 20 36 8-1/2 1 A,E§,G R-1784
R-2475* 22 1-1/2 20 36 6-1/2 1-1/4 A R-1700-A
R-2481 21-3/4 1 19-3/4 32-1/4 8-3/4 1-1/4 A R-1920
R-2494 19-1/2 1-1/2 18 29 5-1/2 3/4 G R-2525-G‡
R-2496 18 1 17 25 4-1/2 1-1/8 G R-2525-E
R-2498 15-3/4 1-3/8 15 23 4-3/4 3/4 G R-2525-D
R-2498-A 15-3/4 1-3/8 15 21 4-3/4 3/4 G R-2525-C
R-2498-B 15-3/4 1-3/8 15 22 3 3/4 G R-1910-D
R-2499 12 1 11 19 4 1 G R-2525-A



The gratings in this series are rated heavy duty when supported on all four sides.

Other special sizes quoted on request in the event none of the standards shown in this series meet your requirements. In ordering replacement grates to be used on existing catch basins, be sure to specify the exact size of opening in which the grate will be used.

Many of the grates in this series can be adapted to trench frames with support on two sides. Most are qualified as heavy duty when the short dimension spans the trench.

Advise loading requirements so we can assist you with your choice.
SQUARE AND RECTANGULAR DRAINAGE GRATES
Catalog
Number		 Dimensions in inches Grate
Type
A B G H
† Convex     ‡ Light Duty     * Grate in two pieces.
 Angle frame available.     ** Grate in three pieces.
Square - Heavy Duty
R-4400 8x8 1-1/4 1x5 1 B 
R-4401 8x8 1 3/8x3 3/8 A 
R-4408 10-1/4x10-1/4 1 7/8x8-1/4 1 B 
R-4441-1 12x12 1 3/8x4-1/2 1 P 
R-4511 14x14 1-1/2 1-1/2x5-1/8 1-1/8 A 
R-4550 15x15 1-1/4 3-1/2x3-1/2 3/4 C 
R-4552 16x16 1-3/4 1-1/4x6-1/4 1-1/4 A 
R-4557 16x16 1-1/4 1-3/16x3-3/8 3/4 A 
R-4558 17-5/8x17-5/8 1-1/4 1x5 1/2 C 
R-4660 18x18 1-1/2 3x4-1/2 1-1/4 C 
R-4662 19-3/4x19-3/4 2-1/2 1-3/8x8-1/2 1 A
R-4720 20x20 1-3/4 1-3/8x3-1/2 1-1/4 C 
R-4721-A 21x21 1-3/4 1-1/2x8 1-1/4 A 
R-4725 21x21 2 3x3 1 C 
R-4760 22x22 1-3/4 3x5-3/4 1 C 
R-4765 23x23 2 1x6-1/4 1 A
R-4808-A 24x24 2 3/8x6-1/8 1-5/8 P 
R-4810 24x24 2 1-3/4x6 1-1/4 C 
R-4820 24x24 2 1-3/4x5-7/8 1-3/8 C  †
R-4826 24x24 2 1x6 1-1/4 A 
R-4832 24x24 1-5/8 1-1/16x4-3/4 1 C 
R-4832-B 26x26 1-3/4 1-1/16x4 1 C 
R-4833 26x26 2 2x7 1 A 
R-4850 27x27 2 2-1/2x7-1/2 1 C 
R-4852 27x27 2 1-1/2x5 1 C 
R-4852-A 27x27 1 1-1/2x5 1 C 
R-4859-C 27-3/8x27-3/8 1 2x7 1 A  ‡
R-4871 27-1/2x27-1/2 1 2x24 1 B  •
R-4880 28x28 2 1-1/2x7-1/4 1 C 
R-4880-C 30x30 1-1/2 1-1/4x5-7/8 1-1/4 C 
R-4882 34x34 2 2x14 1/2 1-1/8 A  •
R-4882-A 34x34 2 1x9 1-1/8 A 
R-4884-A 36x36 1-3/4 2x4 1-3/8 C  *
Rectangular - Heavy Duty
R-4389-O 6x12 1-1/4 3/4x4 1 B
R-4390 6x24 1 3/4x4-1/2 1 B
R-4403 8x14 1 1-1/2x2-1/8 1/2 A
R-4404-C 8x24 1 1-1/16x5-7/8 1 B
R-4406 8x24 1-3/4 1-5/16x6 1 B
R-4406-1 8x24 1-3/4 1x2-5/8 3/4 A
R-4406-2 8x24 1-3/4 1x5 1 C
R-4406-C 9-1/4x23-7/8 1 1x2-7/8 1 A
R-4407-2A 9-1/2x24 1-3/4 1x7-1/2 1 B
R-4409 10x17-3/4 1-1/2 1x3-1/2 1 A
R-4409-A 10x24 1-3/4 1-1/4x4-3/4 1 C
R-4409-C 10x24 1-3/4 1x7 1 B 
R-4409-E 10x24 1-3/4 1x3-1/2 1 A 
R-4409-G 10x24 1-1/2 2x8 1 B
R-4410 10x29 1-1/2 2x8 1 B
R-4421 10x40 1-1/8 1-1/4x8-1/2 1 C 
R-4423-A 10-1/4x48 1-5/8 1-1/2x3-1/8 1 A
R-4424 10-1/2x23-1/8 1-3/4 2x2 1 A
R-4430-A 11x24 1-1/2 3/4x4-1/8 3/4 A
R-4430-B 11-1/2x24 1-1/2 1x6-5/8 1 C
R-4435-1 11-7/8x14 2 1x5-1/2 1 C
R-4443 12x14 1-3/4 1-1/2x5-1/4 1-1/4 A
R-4449 12x24 1-1/2 1-1/2x4-1/4 1 A 
R-4450 12x24 1-3/4 1x4-1/2 1 A 
R-4450-A 12x24 1-3/4 2x2 1 A 
R-4451 12x24 2 1-1/2x3-3/4 1 C 
R-4454 12x26 1-1/2 1/2x11-1/2 1/2 C
R-4460 12x30 2 1-1/4x4 1 A 
R-4462 12x35-3/4 1-1/2 3/4x9 1 B 
R-4470 12x48 1-3/4 1x4-1/2 1 A 
R-4525 14x24 2 1x5-1/2 1 A 
R-4530 14-1/2x22 2 1-1/2x5-1/2 1-1/4 A
R-4531 14-1/2x23-7/8 1 1x5 1 A
R-4540 14-1/2x26-1/2 2 2-1/4x4 1 C
R-4541 14-1/2x28 1-3/4 1-1/4x5 1-1/4 A 
R-4544 14-1/2x37-3/4 1-3/4 2x5-3/8 1-1/4 A
R-4545 14-1/2x48 1-3/4 1-1/4x5 1-1/4 A
R-4548 15x20-1/2 1-1/2 2x2 3/4 A
R-4570-1 15x23 1-3/4 1-1/2x5-1/2 1-1/8 A
R-4570-2 15x23-7/8 1-1/2 1x6 1 A
R-4573 15x30 2-1/2 1-1/8x5-1/2 1 A 
R-4575-A 15x36 1-3/4 13/16x6-1/2 3/4 A 
R-4579 15-1/8x23 1-1/2 1-3/8x5-1/2 1-3/8 A
R-4583 15-1/2x22-1/4 1-3/4 1-5/8x5-1/2 1-3/8 A
R-4584 15-1/2x36 1-3/4 1-1/2x5-1/4 1-3/8 A
R-4585 15-1/2x39 1-3/4 1 7/8x5-7/8 1-1/4 A
R-4586 15-3/4x36 1-3/4 1-1/2x5-1/4 1-3/8 A 
R-4600 16x23 2 1-1/4x3-3/4 1 A
R-4603-A 16x24 1-1/8 3/4x5-1/2 1 A 
R-4604 16x24 1-1/2 2x4 7/8 C
R-4604-C 16x24 2 2x5 2 A 
R-4604-D 16x24 2-1/2 2-1/2x6-5/8 3/4 A
R-4608 16-1/2x19-3/4 1-1/2 1-1/4x6 1 A
R-4610 16-1/2x22 1-3/4 1-1/2x4 1 A
R-4620 17x19 2 1-1/4x4-1/4 1-1/8 A
R-4630 17x20 1-1/2 1-1/4x6-1/2 1 C
R-4632 17x21 2 1-3/8x8-3/4 1 C
R-4640 17x21-1/2 1-3/4 2-1/2x4-1/4 1 A
R-4641-A 17x24 2 1x7 7/8 A 
R-4641-C 17x24 2 1x6-1/2 1 C 
R-4641-F 17x34 1-1/2 1-1/2x6-3/4 1 A 
R-4649 17-1/4x24 1-3/4 1x6-1/2 1 A
R-4649-1 17-1/4x43 1-3/4 1-3/4x3-7/8 1-1/4 C
R-4652 17-3/4x29 3/4 2 1-1/2x4-1/2 1-1/8 A 
R-4670-A 18x24 1-1/2 1-1/8x6-3/4 1-1/8 A 
R-4671 18x24 2 1x7-1/2 1-1/16 A 
R-4672 18x24 2 1-3/8x5-3/4 1-1/8 C 
R-4689 18x27-1/4 2 2x6-3/4 1 C 
R-4692-A 18x34 2-1/4 1-7/16x8 1 C
R-4698 18x36 1-3/4 2x4 1-3/8 A 
R-4710 18x36 2 1-3/4x6-1/4 1-1/4 C 
R-4711 18x39 2 1-1/4x5-1/2 1-1/4 C 
R-4718 18-3/4x36-3/4 2 2x8 1 A
R-4730 19-1/2x32 1-1/2 2x5 1 A ‡
R-4731 19-1/2x39 1-1/2 2x4-1/2 1 C ‡
R-4732 19-1/2x39 1-3/4 1x7-1/2 1 A
R-4736 20x24 2 1-1/2x2-1/2 1-1/4 C 
R-4738 20x24 2 1x5 1 A 
R-4739 20x24 2 1-1/8x4-3/4 1 C 
R-4740 20x28-1/2 2 1-3/4x8 1 C
R-4750 20x30 2 1-3/4x6 1 C 
R-4750-1 20x48 2 1-1/2x5 1 A
R-4751 20-1/2x27 2 1-3/4x5-1/2 1 C
R-4752 20-1/2x36 1-7/8 1-5/8x5-3/4 1-1/8 C
R-4755-B 21x42 1-1/2 1-1/2x5-1/2 1 A 
R-4755-C 21x42 1-1/2 1-1/2x5-7/8 1 C 
R-4759 22x23 1-3/4 1-1/2x6 1 C
R-4762 22x30 1-1/2 2x6-1/4 1 C 
R-4780 22x37 2 2x8 1 C 
R-4781 22x48 2-1/2 1-5/8x5-3/8 1-1/4 C 
R-4795 22-1/2x45 1-1/2 2x6 1 A 
R-4798 23-1/4x36-1/2 2-3/4 1-1/2x7-1/4 1 C
R-4821-A 23-7/8x26 2 1-9/16x4-15/16 1-1/4 C 
R-4825 24x30 1-1/2 1-1/2x4-1/4 1-1/4 C 
R-4825-A 24x30 2-1/4 1-1/4x- 3/4 1 A 
R-4825-B 24x30 2-1/4 1-1/2x6 1 C 
R-4828 24x33 2-1/4 1x4-1/2 1 A 
R-4829 24x33 2-1/4 1-1/2x6-1/2 1-1/4 C 
R-4837 24x35 2-1/2 1-1/2x6-1/2 1-1/2 A
R-4839 24x35-7/8 1-3/4 7/8x9-3/4 1 A 
R-4840 24x36 2 2x4-3/4 1 C 
R-4843 24x36 1-3/4 1-3/4x6 1 A 
R-4853 24x39 2-1/2 1-3/4x5-3/4 1-5/8 A 
R-4853-A 24x45 3 1-1/2x6-1/4 1-1/4 A
R-4853-B1 24x51 3 1-1/2x5 1-1/4 C 
R-4855 26x30 2 1-1/2x5 1-1/4 A 
R-4856 26x32-3/8 4 3-3/8x3-5/8 7/8 C
R-4857 26x48 2 1-1/2x5-1/2 1 A
R-4890 28x37 2 1-3/4x7-5/8 1-1/4 C 
R-4891 * 30x48 1-1/2 1-1/2x4-1/4 1-1/4 A
R-4893 ** 30x78 2 1-1/2x5 1-1/4 C
R-4893-B 32x34 2 1x2 1 C 
R-4894 33x36 2 1-1/2x6-1/2 1-1/4 C 
R-4895-2 * 36x66 2 1-1/2x6-1/2 1-1/4 A 
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In support of the Green Initiative, Neenah Foundry is pleased to report that our products contain a minimum of 85% recycled content in the form of a minimum 35% consumer-generated scrap metal and minimum 50% industrial-generated scrap metal.