Cargo lashing 50 Stf 320 daN LC 4000 daN EN12195-2 specifies the requirements for the design, testing, and use of ratchet buckles as a component of cargo securing systems on road vehicles. Ratchet buckles are commonly used in conjunction with straps or ropes to secure cargo on flatbed trailers, truck beds, and other transport platforms. According to the standard, ratchet buckles must be made of materials that are durable and able to withstand the forces that may be exerted on them during transport. The buckle must be designed to prevent unintentional release of the tensioned strap or rope, and must have a locking mechanism that can be easily engaged and disengaged.