ISO 22915-9:2014 specifies the tests for verifying the stability of counterbalanced trucks with masts when handling empty or laden freight containers of 6 m (20 ft) length and longer. It is applicable to these types of industrial trucks that are equipped with forks, a spreader, (top lift and side lift), or other load handling means applicable for container handling. It does not apply to trucks when handling a container which has a mobile centre of gravity (see ISO 3874).