Abstract: The invention provides a disposable bulkhead for use with containing dry flowable commodities inside an intermodal container. The invention involves supporting a custom-fit cardboard ply bulkhead across the rear of an intermodal container using tension straps arranged to position resistant force at desired locations where pressure against the bulkhead is greatest, while utilizing existing eyelet anchors fixed to the interior of the intermodal container. Breakaways are provided to simplify release of the bulkhead. Straps are positioned to secure the cardboard ply against the interior sidewalls of the container.