How much will a rigid conduit with a 30 degree offset shrink?


It depends on how large an offset is made of. The shrinkage is not dependent on either the type of conduit or on the size of that conduit, however.

There is an example given in the article on the math behind benders that should be of help, though. It concerns the shrinkage of a 3-point saddle; how far the center of the saddle will move from the calculated point desired. As that depends on just half of the saddle, which is an offset, it will give the answer you're looking for. Please reference this article:

Updated on March 27, 2018

Original Article:

A Conduit Bending Guide on How to Bend an Offset
By Dan Harmon