Round Grates

CAST IRON SPECIFICATION >>>

MATERIAL:	Casting materials conform to specification ASTM-A48 Class 30B, Gray Cast Iron, unless otherwise specified
APPEARANCE:	Castings are free from blowholes, shrinkage or other imperfections not true to pattern.
MANUFACTURING:	Castings are manufactured with critical dimensions conforming to those specified on respective data sheets and drawings. Critical dimensions are defined as those that effect the load bearing capacity, interchangeability and drainage opening where applicable. Noncritical dimensions may change slightly to facilitate proper molding and casting technique. We reserve the right to make modifications to these products as required without notification.
TOLERANCES:	Casting Tolerances, unless otherwise specified, are plus or minus 1/16 inch, and an additional plus or minus 1/16 inch per foot of dimension. Notwithstanding these tolerances, all frames, covers, grates and curb hoods of the same nominal size are interchangeable.
MACHINING:	Bearing surfaces of circular heavy and medium duty manhole rings, covers and grates are machined to insure proper fit and prevent rattling.
WEIGHTS:	Casting weights are approximate and shall be within plus or minus 5% of catalog published weight.
PAINT:	Castings are supplied unpainted as a standard (See U.S. Foundry's No Paint Policy). For special paint applications, contact our customer service department.

CLASSIFICATION	LOAD APPLICATIONS	PROOF LOAD TEST
(H) HEAVY DUTY	Highway traffic loads or 16,000 lb. Wheel loads	25,000 lbs. * (Ref: Commercial Item Description A-A 60005)
(M) MEDIUM DUTY	Driveways, parking lots, ramps and other similar applications where wheel loads do not exceed 12,000 lbs.	18,000 lbs. *
(L) LIGHT DUTY	Areas such as sidewalks, terraces and other areas which do not receive vehicular traffic.	1,000 lbs. *

There are currently 32 items in the list

Diameter	Load Rating	Series

USFID	Style	Diameter	Seat Height	Flow Area	Pipe Size	Weight	Load Rating
5600	1	13	1-3/4	40	10"	25	Medium Duty
5601	3	18-7/8	3-3/4	70	15"	110	Heavy Duty
5602	3	22-1/4	3-3/4	110	18	140	Heavy Duty
5603	5-R	29-1/4	3-3/4	185	24"	230	Heavy Duty
5605	1	14-3/4	2-1/2	45	12	45	Light Duty
5608	3	22-1/4	3-3/4	140	18	135	Heavy Duty
5610	1	18	2-1/2	55	15	60	Light Duty
5612	1	18-1/2	3-3/4	55	15	80	Light Duty
5613	6-R	16-1/4	1-1/2	52		70	Heavy Duty
5615	1	20	2-1/2	105	18	80	Light Duty
5620	1	21	2-1/2	110	18	80	Light Duty
5625	1	24-1/2	2-1/2	180	21	150	Heavy Duty
5627	5-R	16-1/4	1-1/2	105		40	Heavy Duty
5628	6-R	22-1/4	1-1/2	125		95	Heavy Duty
5629	6-R	13-1/4	1-1/2	42		35	Heavy Duty
5630	3	22-1/4	1-1/2	150		95	Heavy Duty
5635	3	25-3/4	2	205		155	Heavy Duty
5640	4-R	22-3/4	2	180		130	Heavy Duty
5645	2-R	23-3/4	1-1/4	100		125	Heavy Duty
5650	3	23-3/4	1	130		80	Medium Duty
5655	3	26-3/4	2-1/2	180		225	Heavy Duty
5660	5-R	32-1/4	1-1/2	360		210	Heavy Duty
5665	5	34-1/8	1-1/2	350		215	Medium Duty
5666	6-R	34-1/8	1-1/2	315		240	Heavy Duty
5668	1	31	3	272		150	Heavy Duty
5670	3-R	18	(-)	50	15" CMP	40	Light Duty
5671	3	32-3/8	(-)	195	30" CMP	145	Light Duty
5680	3	16-1/4	1-1/2	90		40	Heavy Duty
5681	5	37	1-3/8	465		285	Heavy Duty
5682	3	23-1/2	1	155		250	Heavy Duty
5685	3	23-1/4	1	155		120	Heavy Duty
5690	7	14-3/4	2-1/2	52		50	(-)