Side lift spreader for lifting intermodal containers, and method of operating side lift spreader

A side lift spreader (20) for lifting an upper intermodal transport container (10') and a lower intermodal transport container (10) stacked on each other comprises a container locking arrangement (30)arranged at a first longitudinal end of the spreader, the container locking arrangement (30) comprising an upper male lock insert configured to be connected to a bottom corner casting of the upper container (10') and a lower male lock insert configured to be connected to a top corner casting of the lower container (10), wherein the container locking arrangement (30) comprises an indicator configured to provide an indication if an attempt is made to connect the lower male lock insert to the bottom corner casting of the upper container (10'). 一种用于提升彼此堆叠的上部联运集装箱(10')和下部联运集装箱(10)的侧向提升吊具(20)，包括：布置在吊具的第一纵向端部处的集装箱锁定装置(30)，集装箱锁定装置(30)包括被配置成连接到上部集装箱(10')的底部角铸件的上部凸锁插入件，以及被配置成连接到下部集装箱(10)的顶部角铸件的下部凸锁插入件，其中所述集装箱锁定装置(30)包括被配置成提供是否尝试将下部凸锁插入件连接到上部集装箱(10')的底部角铸件的指示的指示器。