U.S. FOUNDRY & MANUFACTURING CORPORATION
CAST IRON
CI-18
TRENCH GRATE SOLUTIONS
CONT.
HEAVY DUTY STANDARDS
OPTIONAL
ENDPLATE
BOLTED CAST IRON
FRAME & GRATE
“
A”
“
B”
“
C”
GRATE
SEAT
CLEAR
FLOW
NUMBER
WIDTH
HEIGHT
OPENING
AREA
6451
8
1
1
6
70
6452
10
1
1
8
75
6453
12
1
1
10
100
6454
14
1
1
12
116
6455
17
1
1
15
132
6456
20
1
1
18
138
6457
23
1
1
21
161
6458
26
1
1
24
192
6461
30
2
27
212
1.
Please specify catalog number when ordering.
2.
Grates are furnished in 2" lengths.
3.
Frames are available in 24" Cast Iron or Steel Angle.
4.
Specify end pieces, if required.
5.
All grates can be bolted to frame.
6.
All grates are Heavy Duty Loading.
7.
Solid covers are available in all sizes. Please specify solid
when ordering.
NOTE: DO NOT DISASSEMBLE
BOLTED UNITS DURING FORMING PROCEDURES.
TYPICAL TRENCH
SECTION
C
B
A
OPTIONAL
ENDPLATE
STEEL FRAME
&
GRATE
BOLTING TAB
(
TYP.)
BOLT
OPTIONAL
ENDPLATE
CAST IRON FRAME
&
GRATE
NARROW SLOTTED GRATES
“
A”
“
B”
“
C”
GRATE
SEAT
CLEAR
FLOW
NUMBER
WIDTH
HEIGHT
OPENING
AREA
6266
8
1
1
6
30
6267
10
1
1
8
35
6268
12
1
1
10
50
6269
14
1
1
12
60
All grates have 3/8” wide slots and are commonly used in pedestrian
applications or where ADA compliance is required.
A
B
A
24
C