A shipping container includes a pair of side walls, a rear end, a front end, a roof, and a base frame. The base frame includes two longitudinal bottom side rails and a plurality of parallel bottom cross members on which a corrugated steel floor is resting and to which the cross members are secured. The steel floor includes a plurality of floor slabs and the steel floor includes corrugations. The corrugations having ridges and grooves running in a lengthwise direction of the container towards an opening for loading and unloading goods to be shipped or stored in the container. Attachments for lashing are installed in the corrugated steel floor.