Load assumptions for the design and evaluation of fixed railway crossings are mostly based on normative guidelines and impact force calculation formulas like the Jenkin’s equation. This approach may be appropriate for the principal technical design of a traditional fixed railway crossing with analytical methods. If the assessment of a cast manganese monobloc crossing is done by a FEA model, it is concluded that the assumed impact load and the load position have a significant effect on the obtained local stress results. These two factors are mainly influenced by the wheel-rail contact interface. Therefore, the correct determination of this important input data for performing a FEA of a fixed crossing is not possible without further investigations of the wheel and crossing geometry combination. As a result of this knowledge, a closer examination of this topic is necessary by using MBS and FEA investigations, supported by in-track measurements using strain gauges, accelerometers and displacement sensors. Therefor this paper will address the investigation of the occurring impact loads caused by wheels in different wear conditions on a fixed crossing with initial geometry without wear. Further works will also consider the wear on the crossing side of the wheel-rail interaction geometry. The derived results can lead to an improvement of the current engineering approach and therefore create a new type of fixed crossing that will be designed in the aspect of using the maximum fatigue resistance and minimum material usage.