The results of finite element studies of the stress-strain state of crane beams in normal operating modes in the absence of fatigue cracks, defects and damages are presented. The distributions of the stress intensity and the component of stress tensor, arisen in the upper zone of crane beams wall along its length under different values of the eccentricity of load, caused by the rail shift from the vertical axis of the beam section, were obtained on the basis of performed calculations. The regularities of stress-strain state of beam wall by a number of factors were determined.