In social network studies there is a growing demand for (practical) sampling designs. This demand stems from actual network research which is more and more concerned with studies of large network structures. Unlike studies of small and wellbounded entire networks where the tools of social network analysis (SNA) can be applied, studies of large networks give several problems.The cope with these problems and to elaborate some relevant approach for studying large network structures several steps were considered in this study. Some future issues are discussed.