U.S. FOUNDRY & MANUFACTURING CORPORATION
CAST IRON
CI-20
TRENCH GRATE SOLUTIONS
CONT.
STEEL WELDED GRATES
AIRPORT STEEL GRATES
“
A”
“
B”
“
C”
GRATE
SEAT
CLEAR
FLOW
NUMBER
WIDTH
HEIGHT
OPENING
AREA
6860
8
2
6
108
6861
10
2
8
144
6862
12
2
10
180
6863
14
2
12
216
6864
17
2
15
270
6865
20
2
18
324
6866
26
2
24
432
6867
34
2
31
558
Grates are 280psi aircraft loading. Grates bolted to steel frame. Grates are
galvanized as a standard.
Note: Do not disassemble bolted units during forming procedures. This could
cause bolts and holes not to line up after pouring.
A
B
A
24
C
Please note: Steel grates are an excellent alternative when maximum flow
area is needed.
A
B
A
24
C
“
A”
“
B”
“
C”
GRATE
SEAT
CLEAR
FLOW
NUMBER
WIDTH
HEIGHT
OPENING
AREA
6840
8
1
1
6
100
6841
10
1
1
8
134
6842
12
1
1
10
168
6843
14
1
1
12
201
6844
17
1
1
15
252
6845
20
1
1
18
302
6846
23
2
21
353
6847
26
2
24
403
6848
30
2
27
454
6849
33
2
30
504
6850
36
2
33
554
6851
39
2
36
605
6852
45
2
42
706
6853
51
2
49
823