  Resonant production of fourth chiral family up quark at the LHC via anomalous
interactions have been analyzed. It is shown that search for resonances in
W^{+}b final states could lead to discovery of the fourth chiral family and
simultaneously determine scale of the new physics, presumabely related to the
quark and lepton compositeness. Obtained results emphasize an importance of
W-leading jet invariant mass analysis in search for W+jets final states at the
LHC, both with and without b-tagging.
