  We study the behaviour of free energies of baryonic systems composed of three
heavy quarks on the lattice in SU(3) pure gauge theory at finite temperature.
For all temperatures above $T_c$ we find that the connected part of the singlet
(decuplet) free energy of the three quark system is given by the sum of the
connected parts of the free energies of $qq$-triplets (-sextets). Using
renormalized free energies we can compare free energies in different colour
channels as well as those of $qq$- and $qqq$-systems on an unique energy scale.
