capable of carrying out the calculations of lateral torsional buckling problems. These programs, how To be able to understand the diagrams especially in ever, require additional knowledge of bifurcation and chapter 9 of this book the authors considered it to be eigenvalue problems. Otherwise one has to refer to necessary to offer the non-German speaking reader appropriate tables, diagrams etc. which are known some information. It was not intended to really give a from the literature. Some of which shall be commented literal translation of the German version, but to on briefly in the following: explain why this book was written and how it can be used successfully in practical engineering for both G. M tiller's "Nomograms" [3] used in the analysis of design and proof computation. To the best of the the problem of lateral-torsional buckling for simply authors' knowledge at present, however, both the con supported !-beams, and tables for cantilevered ! tent and the line of treatment used in this book differ beams subjected to vertical loads are well-known from those of other sources. The intention has been to and widely accepted. fill a gap in the literature that really does exist. The fundamental literature on "Flexural-Torsional Problems of Straight Thin Walled Beams" [4] by Roik, Car! and Lindner provides in its diagrams 5. 13 to 5.