The main bridge type crane, the erection and assembly has strict technical requirements, and a set of measurement methods to measure the installation result strictly.
桥架式桥式起重机的主体，其架设和组装都有严格的技术要求，并有一套严格的测量方法来测量安装结果。
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Following delivery to site, columns will be re-assembled and fully welded. Ideally this final assembly should occur within, or close to, pick-up radius of the erectioncrane.
The remodeling process of sloped elevator and erection technology of cantilever tower crane were introduced during the south main tower construction of Queshi Bridge in Shantou.