Bend theory
The math behind conduit bending, explained in plain English. Know why the numbers work, not just what they are.
Where do multipliers come from?
Why 30° is ×2, where shrink comes from, and the exact numbers behind the field values.
Centerline bending radius vs. multipliers
Why the multiplier method drifts on bigger conduit and steeper angles, with tables by size and worked examples.
Parallel offsets: how the adjustment works
Why each conduit shifts by center-to-center × tan(half the angle), and why conduit size doesn't matter.