Analysis of $Z'$-bosons effects at the LHC within ATLAS experiment

We discuss the foreseeable sensitivity to $Z'$-boson effects of $W^\pm$-pair production cross sections at the Large Hadron Collider (LHC). The results of the model dependent analysis are expressed in terms of constraints on such $Z'$-boson parameters as $Z-Z'$-mixing angle $\varphi$ and its mass $M_{Z'}$. It was shown that the process under investigation in the framework of the ATLAS experiment has the sensitivity to the mixing angle $\varphi$, which is similar or even better than that obtained during resonant experiments at LEP1 and SLC accelerators in $e^+e^-\to l^+l^-$ processes.