the present invention relates to a weighing module for measuring wheel contact forces of rail - bound vehicles , comprising a measuring rail and a number of strain gauges , wherein the strain gauges are applied directly on the measuring rail . the measuring rail comprises a load introduction region , made of at least one load introduction part , and at least two deformation bodies , which are connected fixedly in each case to a load output plate and , via a hinge , to the load introduction region . the strain gauges are arranged on the deformation bodies and capture the shear strain acting between the hinges and load output plates .