Calculation Method of Safe Differential Height between Tower Cranes in Multi-cranes Construction

In this article, the author discusses the rationality of some rules of current regulations about the safe differential height between tower cranes. He firstly calculated the installation height of a single crane, then analyzed relevant parameters influencing the differential height between high cranes and low cranes in multi cranes construction, and finally determined three methods to calculate the differential height between cranes and the practical jacking height of cranes. He also verified these methods with the National Great Theater project.