High strength composite cables with large specific strength on the base of such materials as carbon fiber reinforced plastics (CFRP), glass fiber reinforced plastics (GFRP) and vectran, are widely used in constructional practice. But using of a steel component enables to increase small relative elongation, decrease brittleness and expand area of application of high strength composite cables. Steel was investigated in combi-nation with such materials as CFRP, GFRP and vectran. Volume fraction of steel was within the limits of 0.1 to 0.7. Dependence of materials and their content in hybrid composite cables with the steel component on the character of deformations was considered. Hybrid composite cables with the steel component were considered as materials of several cable groups for a prestressed saddle-shaped cable roof. Opportunity to decrease the displacements of composite saddle-shaped cable roof by using of hybrid composite cables with steel compo-nent for several groups of cables was investigated