On average if you have cargo above 750 pounds you should instantly consider using a Ratchet Strap or a Winch Strap if you are using a commercial flatbed trailer. Ratchet Straps and Winch Straps are designed for the heaviest duty cargo securement, whereas Cam Buckles are designed for lightweight to mediumweight cargo.The one main way to tell if you will be safe or not for your load is by looking at the assembly working load limit for each of the straps that you intend on using for your cargo securement needs. If the assembly working load limit is way too little for the weight of your cargo you will want to look for another strap. Although you should always use AT LEAST FOUR TIE DOWN STRAPS when you are securing cargo they may still not be strong enough for your cargo. One important thing to remember when securing cargo is to know that the straps are only as strong as the strap’s weakest link or part of the strap.