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We consider extension of the standard model $SU(2)_l \times SU(2)_h \timesU(1)$ where the first two families of quarks and leptons transform according tothe $SU(2)_l$ group and the third family according to the $SU(2)_h$ group. Inthis approach, the largeness of top-quark mass is associated with the largevacuum expectation value of the corresponding Higgs field. The model predictsalmost degenerate heavy $W'$ and $Z'$ bosons with non-universal couplings, andextra Higgs bosons. We present in detail the symmetry breaking mechanism, andcarry out the subsequent phenomenology of the gauge sector. We compare themodel with electroweak precision data, and conclude that the extra gauge bosonsand the Higgs bosons whose masses lie in the TeV range, can be discovered atthe LHC.

The Family SU(2)_l x SU(2)_h x U(1) Model