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An offset bend uses two equal bends in opposite directions to shift the conduit from one plane to another. The rise is the vertical distance between the two parallel planes. The run is the horizontal distance over which the offset occurs.
FORMULA
angle = atan(rise / run) distance between bends = rise / sin(angle) shrink = rise × shrink-per-inch (from table)
FIELD TIPS
- •Common angles: 10°, 22.5°, 30°, 45°, 60°
- •30° is the most popular for general offsets
- •Always account for shrink when measuring total conduit length
- •Mark both bends before bending — measure twice, bend once
More lessons coming — common mistakes, code references, and interactive practice problems.