The department for road design in Lower Austria needs to characterize fractured rock slopes and to define stabilization measurements. In this case one important parameter is the uniaxial compressive strength (UCS) of the intact rock. A direct determination of the UCS based on uniaxial compressive strength tests is time-consuming, cost-intensive and sometimes not possible, therefore indirect estimations are often preferred. In the present study nine different rock slopes where investigated. On the one hand the point-load-index was determined and on the other hand the mean rebound-hardness was recorded by Schmidt-Hammer investigations. On this data basis and by the use of different empirical studies, estimations for the indirect uniaxial compressive strength were calculated. Finally, the applicability of the different methods as well as the usability of empirical studies for the indirect determination of the uniaxial compressive strength are discussed.