Fasten a rack section to each side of a spine as shown
and bend the fingers out to suit the part being racked.

This typical assembly may be used for racking tubes.
Use rack sections in pairs, one on each side of a spine. The spines
are then assembled with a Cross Member at the top and bottom,
to form a rigid assembly. For long tubes, use an assembly as shown,
with full rack sections in the center and half rack sections on each end.