Grates and Trench Covers The benefits of the LiftMate™ Hinge System are available with the proven strength and perfor- mance of Neenah Foundry grates and trench covers. rates meet or exceed all applicable strength and traffic loading requirements. Hydraulic performance information available on request.
Available Security Options In addition to high-strength camlock mechanisms, Neenah offers a wide range of bolt options.
Countersunk bolts for security furnished standard
LiftMate™ Hinge System grates and trench covers, cast from high-strength gray iron or ductile iron as appropriate, offer exceptional durability and hydraulic performance.
Optional camlock mechanism for added security
LiftMate ™ Hinge System LiftMate ™ Frame, Solid Gasketed Lid Model Clear Opening (Diameter)
Also Available: LiftMate ™ Trench Frames and Grates Rated for Airport & Container Port Use. Manufactured using high-strength ductile iron to meet or exceed airport and container port guidelines 3 . Hydraulic performance information available on re- quest. For complete listings of systems rated for these applications, refer to the Neenah Foundry Airport and Port-Type Castings catalog.
Frame Height
R-1550-LM R-1642-LM R-1650-LM R-1743-LM
21"
9" 7" 4" 6" 7" 7"
24- 1 ⁄ 24- 1 ⁄
8 " 8 "
30"
R-1753-ALM R-1755-F2LM
27- 1 ⁄
8 "
Model
Frame Height
Clear Opening (Trench)
25"
R-4994-HALM
24"
6"
LiftMate™ Inlet Frame, Grate Model
Clear Opening
Frame Height
Free Open Area (sq ft)
Weir Perimeter (lineal ft)
R-3210-ALM R-3210-LLM R-3222-1ALM
22"x22" 22"x22" 22"x19- 1 ⁄
6" 6" 7"
1.5 1.4 1.5
8.0 8.0 8.0
2 "
Contact your Neenah Representative for complete details. Neenah Foundry can also custom make sizes according to your specifications.
3 Capable of withstanding minimum 100,000-pound loads and other criteria as specified in applicable FAA Advisory Circulars.
SURGE RELIEF hinge allows pressure relief but prevents lid blow-off
TRAFFIC RATED exceeds 40,000-pound proof loading requirements of AASHTO-M-306-07
WORKER PROTECTION
SECURITY available bolt and cam- lock options effectively resist unauthorized access
reduces operators’ risk of excess physical strain and off-balance maneuvering
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