The project solves the creation of calibration relations for determining the compressive strength and static modulus of elasticity of the bridge concrete class C 30/37 XF4 by indirect (non-destructive) methods. Samples were taken on the building site of the bridge on the Sportovní St. in Brno. Testing pieces (18 + 18) were tested by impact hammer Schmidt type N, SilverSchmidt PC N and by ultrasound in 6 stages for three bodies. The result is set of calibration equations for determining the development of compressive strength and modulus of elasticity for different methods and their combinations.