  Twist operators in the closed sl(2) sector of planar N=4 SYM are
characterized by their spin. The explicit dependence of anomalous dimensions on
this important parameter is a source of interesting information. Wrapping
corrections are a non trivial part of the calculation and are under control in
the framework of thermodynamical Bethe Ansatz valid for the full theory and
thoroughly checked in that sector. The extension to more general twist
operators beyond sl(2) has been recently accomplished for the so-called 3-gluon
operators that are a special case of the generalized twist operators introduced
by Freyhult, Rej and Zieme. Such operators are dual to spinning strings
configurations with two spins S1, S2 in AdS_5 and charge in S^5. We compute the
expansion of the weak-coupling leading order wrapping correction in the gauge
theory limit dual to large S1 and fixed S2. We present a simple algorithm for
the calculation and provide explicit results illustrating the general structure
of the expansion.
