Specifies the total length of the unfolded manufacturing object.
The unfolded length values are the lengths of the extended objects after they are
unfolded but before any features are applied. This length has almost no meaning to
the designer because the extended length could be arbitrarily long. If the unfolded
length is shorter than Length Structural Detail Total, the unfolding process may have been unsuccessful. Because the object is extended
as a whole, the summation of the unfolded lengths for the individual faces equal the
total unfolded length. Because most stiffeners do not have a bottom flange, the bottom
flange unfolded length is typically zero. The same holds for stiffeners that do not
have a top flange.