R-4990-EF End Frame

R-4990-EF End Frame

Grate Length : 24″
Grate Width (OD) : 20″
Clear Opening (ID) : 17″
Available Depth : 1.5″
Max. Flow Rate : 79.75 GPM, per foot


R-4999-FX 20″ Trench Drain Grate

Grate Length 24″
Grate Width (OD) 17″
Channel Width (ID) 15″
Material Cast iron
Available Depth 1.5″
Max. Flow Rate 79.75 GPM, per foot



  • Highway rated
  • Heavy Duty Cast Iron
  • Made in USA
  • Type A, B, C, D Covers
  • Comes with or without frames (rails)
  • Components resist fading and cracking from the sun
  • Comes unpainted
  • Multiple sizes and configirations

Materials: All frames and grates or lids are made in standard gray iron, meeting ASTM-A48 Class 35-B for heavy-duty use. For extra heavy-duty use or
superior durability requirements, see our ductile iron Airport and Port Grating Series on page 286.
Neenah recommends project designers avoid the use of light duty trench installations because it is likely that applications will be subjected to heavy
delivery vehicle traffic at some time. Furthermore, the use of a site could be changed to heavy duty use patterns at some unanticipated future date.
Bolted trench drain grates shall be installed grate on frame.

Easy Forming Procedures

Type A, C, D, E, P, Q grates available. Thin slot, ADA, Horizontal Slot and Vertical Slot. Full NFCO Castings Catalog

R-4999FX_20_Wide_Bolted Submittal_Package
Neenah Trench Drain Grate Catalog

Cut Sheets

Catalog Sheet

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