A stub-up is a single 90-degree bend whose vertical leg ends at a required height, such as pipe rising from a slab into a wall or a panel. It is laid out by subtracting the bender's take-up, or deduct, from the stub length: on EMT hand benders the usual figures are 5 inches for 1/2 inch, 6 for 3/4 and 8 for 1 inch. The mark lines up with the arrow on the bender shoe and the pipe is bent to 90.
Ten-inch stub-up in half-inch EMT, so make your mark at five and line it up with the arrow.
Also heard as
- stub
- stub up
Related terms
Ninety
Shop name for a 90-degree conduit bend, whether factory-made or bent on site.
Back-to-back
Bend layout that sets the outside distance between the backs of two 90-degree bends in one piece of conduit.
Gain
Length saved because conduit turns around a curve instead of a sharp corner, used when cutting pipe to length.
Kicker
Single shallow bend that angles conduit off its line, for example to bring it out from a wall into equipment.