Try unfolding the part then offsetting all of the edges from one end by the 3 Metre distance then offset from the resulting sketch 3 Metres continuing until you have the required amount of sketches you need to divide the pole into.
Then using the split feature you can "chop" the pole into the individual lengths you need. Now proceed to use fold feature for each section.
You should now have a pole divided up as required.
Sample file attached.
20 metre-modified.zip 950.8 KB