Table
Offset Shrink Constants by Angle
Offset Shrink Constants by Angle lookup table with assumptions and boundary notes.
Scope
Geometry planning only. Actual field layout depends on bender markings, raceway type, and installer tolerance.
Lookup table
Estimate conduit shrink per unit of offset for common offset bend angles.
Scroll sideways to keep row labels aligned with hidden columns.
| Bend angle | Shrink per unit offset | Field approximation | Use |
|---|---|---|---|
| 10 | 0.087 | about 1/16 per unit offset | Shrink = offset depth x shrink constant |
| 22.5 | 0.199 | about 3/16 per unit offset | Shrink = offset depth x shrink constant |
| 30 | 0.268 | about 1/4 per unit offset | Shrink = offset depth x shrink constant |
| 45 | 0.414 | about 3/8 per unit offset | Shrink = offset depth x shrink constant |
| 60 | 0.577 | about 1/2 per unit offset | Shrink = offset depth x shrink constant |
Notes
- Check table values for preliminary lookup and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.