The aim of the paper is to present a new model in terms of improvements of the original analytical model by Flaig & Blass (2013). Model improvements as presented by Danielsson & Serrano (2018) are reviewed and further improvements of that model are also presented. The differences between the models concern internal force and stress distributions relevant for shear failure mode III of CLT beams. Predictions of the original and the new analytical models are compared to results of 3D FE-analyses and design proposals based on the new analytical model are presented.