I would recommend looking at straps for flatbed trucks. They are usually made of strong polyester webbing and come in different lengths (e.g. 20-30 feet) and Working Load Limits that are selected based on the weight of the cargo. Personally, I prefer to use straps for flatbed trucks that I ordered from Flatbed Securement & Trucking Equipment Store
https://flatbedequipment.com/collections/straps . They hold the cargo in place pretty well.