What is the standard Standard Tension Force (STF / standardna sila zatezanja) indicated on the label of a professional 50 mm ratchet tie-down lashing strap?

1. Typically STF = 300 to 500 daN (decanewtons) applied by hand ratchet tensioning
2. STF = 5,000 daN
3. STF = 10 daN
4. STF is not measured on European certified straps