PM&I: Catalog of Cast Trench Grates and Frames: Drainage Trench: R-4990 Airport Trench

PACIFIC MARINE & INDUSTRIAL

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Trench Grates and Frames
R-4990 Airport Trench

Airport, Port & Heavy Industrial Series

Bolted Trench for Extra Heavy Duty Applications

Dimensions in Inches
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.

SINCE 1985