28.5. The TUBE Local Axes

The local axes used for output of element loads from Stage 6 are defined as follows:

Local X-axis - along the TUBE axis from Node #1 to Node #2
Local Y-axis - perpendicular to the local X-axis, in the global XY plane
Local Z-axis - orthogonal to the local X- and Y-axes with vertical component in the positive global Z-direction

For the special case of a vertical tube:

Local X-axis - along the TUBE axis from Node #1 to Node #2
Local Y-axis - forms a right-handed set with local X- and Z-axes
Local Z-axis - in the negative global X-direction

The local axis vectors are output in the .LIS file.