Airport Castings: Spring Assist Hatches

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R-3498

Gray Iron Frames with Ductile Iron Lids – Proof Load Tested to 200,000#
Patent #7216459

Catalog Number	Grate Type	Square Feet Open	Weir Perimeter Lineal Feet
R-3498-K2GS	A or C	1.5	8.6
R-3498-P2GS	A or C	2.1	10.5
R-3498-R2GS	A or C	3.0	12.8
R-3498-R3GS	A	6.0	19.0

Castings strong enough to handle severe loads are inherently heavy. Lifting these heavy lids/gates to gain access to sub-ground utilities has been an issue for maintenance crews. Lifting these heavy covers requires multiple personnel and lifting equipment. With Neenah's Spring-Assist Hatches, a single maintenance worker can quickly open the lid, and secure it in the upright position with Neenah's hold open device and perform the necassary work.

Catalog No. Solid Lid	Catalog No. Open Grate	A	B	C	D	E	Lid Weight
Square
R-3498-K2S	R-3498-K2GS	25-3/4 x 25-3/4	1-1/2	24 x 24	30 x 30	4	251#
R-3498-P2S	R-3498-P2GS	32 x 32	1-1/2	30 x 30	36 x 36	4	358#
R-3498-R2S	R-3498-R2GS	38-3/8 x 38-3/8	1-1/2	36 x 36	42 x 42	4	471#
R-3498-T2S*	–	50 x 50	1-1/2	48 x 48	56 x 56	4	571#*
Rectangular
R-3498-J3S	–	25-7/8 x 37-7/8	1-1/2	36 x 24	42 x 30	4	340#
R-3498-R3S* **	R-3498-R3GS* **	76-9/16 x 38-3/8	1-1/2	74-3/16 x 36	80-3/16 x 42	4	471#
* 2-piece cover	** with support bar

FEATURES UNIQUE to the NEENAH R-3498 SERIES

• Lid mounted springs move out of the free open area, exposing the free opening.
• Spring position allows more spring rotation, thus more spring power.
• Slam-latch enables opening and closing with ease. Simply pop the lid open and slam it shut.
• Self-contained frame, lid and spring assembly pushes on itself, not external wall structures.
• Easy spring removal and replacement
• Neenah's Perma-Grip non-skid surface.
• Optional tool-less latch release for fire hydrant or quick access applications.

Optional threaded hole in frame for Grounding Strap – specify if required.