Abstract: A holder sheet device (100, 200) to securely hold boxes (50) together on a flatcar is disclosed, comprising at least one elongated sheet member (101, 102, 201), anchor belt (3, 23), and fastener (4, 24). Optionally, the holder sheet device is further provided with elastic connector (10). The anchor belt is spanned over the boxes and holds a portion of the holder sheet device so that a single worker can easily mount and set the holder sheet device on the boxes.