Airport Castings: Inlets

Neenah Foundry offers a variety of cast iron inlets for the airport sector. Select from the list below to find the inlets that fit your needs.

R-3475+

R-3475

Airport Drainage Inlet Frame, Deep Vertical Bar Grate

R-3475

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475 A 2.7 9.8
  • Also avaliable with Special Type C solid cover.
  • Also available with 3-1/2" adjusting frame

R-3475-3+

R-3475-3

Airport Drainage Inlet Frame, Double Grate

R-3475-3

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-3 A 4.1 13.7

R-3475-A+

R-3475-A

Airport Drainage Inlet Frame, Deep Vertical Bar Grate

R-3475-A

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-A A 2.7 9.8

R-3475-E+

R-3475-E

Airport Drainage Inlet Frame, Single Ductile Iron Gate

R-3475-E

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-E A 2.4 9.8
  • Features easy-to-install one-piece frame.

R-3475-F+

R-3475-F

Airport Drainage Inlet Frame, Double Ductile Iron Grate

R-3475-F

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-F C 4.8 13.8
  • Each grate has a free open area of approximately 2.4 square feet.
  • Features easy-to-install one-piece frame.

R-3475-G+

R-3475-G

Airport Drainage Inlet Frame, Triple Ductile Iron Grate

R-3475-G

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-G C 7.2 17.8
  • Each grate has a free open area of approximately 2.4 square feet.
  • Features easy-to-install one-piece frame.

R-3475-H+

R-3475-H

Airport Drainage Inlet Frame, Quad Ductile Iron Grate

R-3475-H

NOTE:

  • Clear opening is 32" x 96"
  • Frame height is 3-3/4"
  • Use same grates as R-3475-G
Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3475-H C 9.6 21.8
  • Each grate has a free open area of approximately 2.4 square feet.
  • Frame/Grate units can be combined for longer length runs if specified.

R-3477-A+

R-3477-A

Airport Drainage Inlet Frame, Double Grate

R-3477-A

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3477-A C 3.3 12.3
  • Anchors 12" on center.

R-3480+

R-3480

Airport Drainage Inlet Frame, Double Grate

R-3480

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3480 C 3.3 12.7
  • Avaliable with solid Type C cover upon request.

R-3480-A+

R-3480-A

Airport Drainage Inlet Frame, Single Grate

R-3480-A

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3480-A A 1.6 8.5
  • Avaliable with solid Type C cover upon request.

R-3481+

R-3481

Airport Inlet, Double Grate

R-3481

Grate is supplied as Ductile Iron.

Catalog Number Grate Type Square Feet Open Weir Perimeter Lineal Feet
R-3481 C 3.3 12

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