Abstract: Freight carrying platforms are disclosed which can be stacked when empty and interconnected to enable the stack to be handled as a unit by conventional handling equipment for ISO Containers. Each platform has a set of links in the form of closed loops. Each such loop is traversed by a bar rigid with the platform and in the unlinked state hangs down from its bar. During linking, each link is lifted into a slot in the next superimposed platform and engaged by a sliding bolt of the latter. Two types of lateral registration means are disclosed.