containers regression and contents[edit] Main article: Load securing There are many established methods and materials for stabilizing and securing intermodal containers regression loaded on ships, as well as the internal cargo inside the boxes. Conventional restraint methods and materials such as steel strapping and wood blocking and bracing have been around for decades and are still widely used. Polyester strapping and lashing, and synthetic webbings are also common today. Dunnage bags (also known as air bags) are used to keep unit loads in place. Flexi-bags can also be directly loaded, stacked in food-grade containers regression. Indeed, their standard shape fills the entire ground surface of a 20 ISO container. Containers can be horizontally connected with lashing bridge fittings Dockworkers securing containers regression on a ship with steel lashing bars and turnbuckles Polyester Lashing Application Polyester Strapping and Dunnage Bag application Application in container Security[edit] Intermodal containers regression which contain valuables can be the target of break-ins and burglary when left unattended. In these cases, the container may be fitted with a security system consisting of a motion detector and panel inside the container. The panel can trigger a siren, strobe, or light to deter intruders, or use a radio signal to alert security guards. Items that were packed incorrectly may come loose and cause a false response from an inside motion detector. If criminals break in by cutting through a wall of the container, the obstructed motion detector becomes useless. Tomographic motion detectors work well in intermodal containers regression because they do not require a line of sight to detect motion. The entire container is covered by a volumetric sensing mesh that is not blocked by equipment or inventory. Tomographic motion detection is not prone to misdetection due to dirt buildup as is the case for beams and infrared sensors.
