  In this work we interpret the Einstein-Hilbert (EH) Lagrangian of gravitation
as the first term of a low-energy effective theory similar to those considered
in the chiral Lagrangian approach to low-energy hadron physics or the
electroweak chiral Lagragians describing the symmetry breaking sector of the
Standard Model (SM). Starting from the one-loop computation of the elastic
graviton-graviton scattering amplitude by Dunbar and Norridge, we unitarize the
IR regularized partial waves by using the Inverse Amplitude Method (IAM). This
method enlarges the regime of applicability of the perturbative results to
higher energies of the order of the Plank scale $M_P$ and allows for the
possibility of poles in the second Riemann which have the natural
interpretation of dynamical resonances. In this work we look for these possible
resonances for the $++++$ and $ -- -$ helicity channels and the $J=0$, $2$ and
$4$ partial waves.
