Define the position of the centroid of the beam section.
This option can be used only in conjunction with the BEAM GENERAL SECTION,
SECTION=GENERAL
or the BEAM GENERAL SECTION,
SECTION=MESHED
option. It cannot be used if you include the
FULL COUPLING parameter for the SECTION STIFFNESS option.
It is used to define the position of the centroid of the section with respect to the
local (1, 2) axis system.