An array of rods in 3 beams, with centerlines of beams intersecting at a point, forming a Cartesian coordinate system. Primary beam is a pair of 2 rods, indicated with red tips. Other colors indicate concentric multiples of primary pair, maintaining symmetry about axes.
Showing some sets of rods deleted, while maintaining symmetric intersection of beams.
Another set of rods that form a symmetric intersection as a kind of cage.
Related Arrays in four-directional system can be viewed Here