• - The Expert Answer: Never place a standard dunnage bag directly between the cargo and the container doors. If the cargo shifts, the door pressure can build dangerously, leading to a potential "door pop" injury upon opening. Best practice is to secure the load 1-2 feet away from the door with secondary bracing (like specialized woven cord lashing or a rigid end-wall/brace) and then use dunnage bags to fill the void between the cargo blocks.