Laying Out Offset Bends - Greenlee 884 Manual De Instrucciones

Bending Instructions (cont'd)

Laying Out Offset Bends

An offset bend is used to route the conduit around an
obstruction. To make an offset, two bends are required.
The operator must measure the height of the offset and
determine the angle of the offset. The distance between
the two bends is the center-to-center distance.
CENTER-TO-
CENTER-TO-
CENTER
OF BENDS
1. Measure the obstruction.
2. Determine the angle of the offset bends.
3. Calculate the center-to-center distance. Refer to the
"Greenlee Offset Multiplier and Shrink Table."
Note: If working toward an obstruction, calculate
the amount of shrink. Refer to "Calculating Shrink"
in this section of the manual.
4. Mark the conduit.
5. Refer to the bending instructions under "Bending
Conduit" in this manual.
OFFSET ➧
Maximum
Conduit Size
15°
Center-
to-Center
Maximum
Common
Conduit Size
Offset 30°
Center-
Bends
to-Center
Maximum
Conduit Size
45°
Center-
to-Center
Greenlee / A Textron Company
CENTER
OF BENDS
OFFSET
HEIGHT OF OFFSET
OFFSET
ANGLE
2 4 6
3/4 1-1/2 3-1/2
7-3/4 15-7/16 23-3/16 30-15/16 38-5/8
3/4 1
8 12
1/2
8-1/2
884 and 885 Hydraulic Benders
Calculating the Center-to-Center Distance
To calculate the center-to-center distance of commonly
used offset bends, multiply the amount of offset by the
appropriate offset multiplier:
Angle of Offset
15°
22-1/2°
30°
45°
60°
To use this table, measure the obstruction and deter-
mine the angle of the offset. Find the angle of the offset
in the left column. Multiply the height of the obstruction
by the corresponding multiplier in the right column to
find the center-to-center distance.
Example:
Multiplier for 15°: 3.86
Multiply the amount of offset by the multiplier to find
the center-to-center distance:
Round off to the nearest common fraction:
The "Offset Table" shows the center-to-center distance
for selected amounts of offset for commonly used
bends.
Offset Table
8 10 12
4 4 4
46-3/8
1-1/2 2 2-1/2
16 20 24
1 1-1/4 1-1/2
11-5/16 14-1/8 16-15/16 19-13/16 22-5/8 25-7/16 28-1/4 31-1/8
8
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Offset Multiplier
3.86
5" of offset
15° bend
5 x 3.86 = 19.3
19-5/16
14 16 18
4 4 4
54-1/16 61-13/16 69-9/16 77-1/4
3-1/2 4 4
28 32 36
2 2-1/2 3
2.6
2
1.4
1.2
20 22
4 4
85
4 4
40 44
3-1/2 4