How to Bend a 90° Stub-Up: Deduct and Cut Length

The stub-up is the basic bend: one 90 that turns the conduit up a wall or out of a floor with its end at a set height. Measure the stub, take off the bender’s deduct, and bend at the mark.

What to measure

• Stub length: from the end of the conduit to the back of the finished 90, the outside of the bend.
• Other leg (optional): the other leg, also to the back of the 90. With it you get the Cut length.
• Deduct (optional): leave it blank to use the bender’s. Enter your own if you have checked your bender and it bends long or short.

How to bend it

1. Mark the conduit at Mark at, measured from the stub end.
2. Put the mark on the arrow with the hook facing the stub end.
3. Bend until the stub is plumb, and check it with a level.
4. Measure from the end to the back of the bend to confirm the stub length.

Where the numbers come from

The deduct covers the radius, half the conduit’s OD, and the short straight between the arrow and where the bend starts. The gain is what the conduit saves by going round the bend instead of out to the corner, counted to the back of both legs.

If it turns orange or red

Red means the stub is shorter than the deduct: the mark would fall off the end, and this bender can’t make a stub that short. Bend a longer stub and cut it down, or use a smaller shoe. Orange means the cut length is longer than one stick of conduit (set under Stick length in Settings).