Greenlee SITE-RITE 840A Mode D'emploi page 8

Working Toward an Obstruction (cont'd)
Example 2: 45° x 45°, Working Toward an Obstruction
10 inches of offset
1. Calculate the shrinkage. See the Offset Table, Column 3. (The
amount of shrink for 45° x 45° offsets is 3/8" per inch of offset
depth. 3/8 x 10 = 3-3/4")
2. Measure the distance to the obstruction. Add the shrinkage to this
distance. (See the illustration. The distance to the obstruction is 30".
30" + 3-3/4" = 33-3/4)
3. Determine the center-to-center distance. Use one of these two
methods:
• Find the appropriate multiplier in the Offset Table, Column 2.
(For 45° x 45°, the multiplier is 1.4). Multiply the height of the
obstruction by the multiplier (10" x 1.4 = 14).
• See the Greenlee Speed Guide for Offsets. In the Offset Depth
Inches column, find the row with the appropriate amount of offset.
Find the Center-to-Center column under the appropriate OFFSET
ANGLE. The distance shown at the intersection of the appropriate
row and column is the center-to-center distance. (Under Offset
Depth Inches, see the row labeled "10". Read to the right to find
the Center-to-Center distance under 45° x 45°. The number
shown is 14".)
4. Mark the conduit as shown.
5. See the bending instructions.
3-Bend Saddles
Like an offset, a saddle is used to avoid an obstruction. In this case,
three bends are used. The first and last bends are of the same degree;
the center bend is twice the number of degrees of the other two bends.
See the illustrations.
8
SITE-RITE
33-3/4"
MARK B
30"
Hand Benders
®
14"
45°
OBSTRUCTION
Greenlee Tools, Inc.
MARK A
10" DEPTH