To switch the ends of a member
To switch the start and end nodes of a member, use the following procedure.
Members end nodes are assigned in the order in which the member was drawn, with Node A (i.e., the "i" end) at the first node of the member and Node B (i.e., the "j" end) at the last node of the member.
Note: The default rotation of a beam is not changed (i.e., local y parallel to the global Y axis in most circumstances). The local x and z axes will point in the opposite directions. If a beam has a rotation angle assigned, that value is not changed. Therefore, the beam will be rotated by the same angle but the local y and z axes now point in different directions than before.