Trench Castings: Airports, Ports, Industrial

Neenah Foundry offers a variety of cast iron airport trenches. Select from the list below to find the airport trench that fits your needs

R-4990 Airport, Port & Heavy Industrial Series+

R-4990 Airport, Port & Heavy Industrial Series

Bolted Trench for Extra Heavy Duty Applications

These trench drains are capable of supporting the heavy wheel loads of today's commercial environments. For larger trench widths or greater loading requirements, please contact our Product Engineering Department.

Grates are bolted to gray iron frames.

For alternate frame options, please see the R-4993 and R-4994 series trench below.

R-4990 Airport, Port & Heavy Industrial Series

  • Suitable for aircraft loading per AC150/5320-6D
Catalog No. A B C Grate Material
R-4990-AA 8 2 6 Gray Iron
R-4990-BA 10 2 8 Gray Iron
R-4990-CA 12 2 10 Ductile Iron
R-4990-DA * ** 14 2 12 Ductile Iron
R-4990-EA * 17 2 15 Ductile Iron
R-4990-FA * 20 2 18 Ductile Iron
R-4990-HA * 26 2 24 Ductile Iron
R-4990-KA2 * 34 2 31 Ductile Iron
R-4990-OA * 51 2 48 Ductile Iron
* Type D solid cover available.
** Type C grate available.

Ductile iron furnished in grade 80-55-06.

R-4993 and R-4994 Superior Durability Frame Series+

R-4993 and R-4994 Superior Durability Frame Series

For Airports, Ports, Industrial Sites and Roads

Superior Duty Frames

Designers have the option to utilize either of these new frames in locations where it is deemed that traditional angle frames could break loose from concrete due to extraordinary conditions.

A few examples of such conditions are:

  • Breaking forces of ultra heavy vehicles
  • Torsional forces due to turning aircraft and container port vehicles
  • Heavy airfield and industrial applications
  • Highway tunnels
  • Certain highway applications

Neenah offers two frame choices each with it's own unique benefits.

R-4993 and R-4994 Superior Durability Frame Series

  • 254 square inches of masonry contact surface per foot.
  • 150 square inches of masonry bearing surface per foot.
  • Frame top section provides transition platform onto and off grating surface.
  • Provision for bolting successive frame sections together.
  • Provides significant reinforcing bar opportunity.
  • Bolt holes are drilled clear through cantilever seat and will not trap debris.
  • 350 square inches of masonry contact surface per foot.
  • 65 square inches of masonry bearing surface per foot.
  • Unique frame shape allows the clear opening to be wider than typical.
  • Bolt holes are drilled clear through cantilever seat and will not trap debris.
  • Provision for bolting successive frame sections together.
  • Frame is integrated within the concrete slab.
  • Available with LiftMate ball and socket connector. See R-4999-HALM.

R-4993 and R-4994 Superior Durability Frame Series

Note: Typical "L" Shaped angle frame has about 120 inches of masonry contact surface per foot and about 54 inches of masonry bearing surface per foot.

Type T Type S Type T Type S Type Type Type Type Type Type Type
Catalog No. Catalog No. A B C E C E A C D E L P Q
Heavy Duty
R-4993-AB R-4994-AB 8 1-1/2 6 19-1/4 4 18 x x x x x
R-4993-BB R-4994-BB 10 1-1/2 8 21-1/4 6 20 x x x x x
R-4993-CB R-4994-CB 12 1-1/2 10 23-1/4 8 22 x x x x x
R-4993-DB R-4994-DB 14 1-1/2 12 25-1/4 10 24 x x x x x x x
R-4993-EB R-4994-EB 17 1-1/2 15 28-1/4 13 27 x x x x x
R-4993-FB R-4994-FB 20 1-1/2 18 31-1/4 16 30 x x x x x
R-4993-GB R-4994-GB 23 1-1/2 21 34-1/4 19 33 x x x
R-4993-HB R-4994-HB 26 1-1/2 24 37-1/4 22 36 x x x x x
R-4993-JB R-4994-JB 30 2 28 41-1/4 26 40 x x x
R-4993-KB R-4994-KB 33 2 31 44-1/4 29 43 x x x x
R-4993-LB R-4994-LB 36 2 34 47-1/4 32 46 x x x
R-4993-MB R-4994-MB 39 2 37 50-1/4 35 49 x x x
R-4993-NB R-4994-NB 45 2 43 56-1/4 41 55 x x x
R-4993-OB R-4994-OB 51 2 49 62-1/4 47 61 x x
Airport, Port, Industrial Loads
R-4993-AAB R-4994-AAB 8 2 6 19-1/4 4 18 x
R-4993-BAB R-4994-BAB 10 2 8 21-1/4 6 20 x
R-4993-CAB R-4994-CAB 12 2 10 23-1/4 8 22 x
R-4993-DAB R-4994-DAB 14 2 12 25-1/4 10 24 x x x
R-4993-EAB R-4994-EAB 17 2 15 28-1/4 13 27 x x
R-4993-FAB R-4994-FAB 20 2 18 31-1/4 16 30 x x
R-4993-HAB R-4994-HAB 26 2 24 37-1/4 22 36 x x
R-4993-KAB R-4994-KAB 34 2 32 45-1/4 30 44 x x
R-4993-OAB R-4994-OAB 51 2 49 62-1/4 47 61 x x
x – indicates availability

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