The Wanan bridge in Quanzhou of Fujian Province, China's earliest stone beam bridge built on a large scale, occupies an important place in the history of Bridges of China and even of the world.

福建泉州万安桥是中国最早的大型石梁桥，在中国乃至世界桥梁史上占有重要的地位。

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As a type of special equipment, the construction of large-scale cranes is very difficult, especially the main beam camber control and the deformation control.

这种大型特种设备建造施工难度大，特别是主梁的上拱度控制、大型箱体结构的变形控制都较一般结构难度大。

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In this article, the author points out some important questions about routine management of the crane beam through the assessment on a large-scale factory building's crane beams.

通过对某大型厂房吊车梁的鉴定分析，指出了该类吊车梁在日常管理中应注意的几个问题。

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